--User changes

-Give tabs a height of 4px in the qss files. Looks a little large on 4k screens, but just right on HD screens which are much more common.
 -Allow for styling of zero and non-zero variation tree nodes via qss.
 -Allow for toggling whether to interpolate between colors in the palette editor, or to do hard cuts between colors.
 -Allow for adjusting spinner values with the + = or up arrow keys to increase, and - _ or down arrow keys to decrease.
 -Allow for responding to global presses of + = and - _ to cycle up or down to specify which xform is set as the current one.
 -Allow for adding "layers" via xaos which will add a user-specified number of xforms, and set certain xaos values to 0 or 1.
 -Add a new menu item under the Edit menu to copy the OpenCL iteration kernel source to the clipboard.
 -Show text on the status bar which indicates that an OpenCL kernel compilation is taking place.
 -Show xform name on xform combo box when expanded. Adjust size to fit all names.
 -Draw post affine circles using dashed lines.
 -Prevent QSS dialog from styling its editor, which makes it easier to see text when creating styles which have custom colors for text boxes.

--Bug fixes
 -Fix up some table layouts which seemed to have regressed/decayed over time for reasons unknown.
 -Using undo/redo would create a new flame in the library every time.
 -Solo was not being preserved when using undo/redo.

--Code changes
 -Make the solo flag be a part of the flame data now.
 -Fix some tabification in the OpenCL code for EllipticVariation.
 -Fix tabification in the varState code for OpenCL.
 -Add an event called m_CompileBegun to RendererCL that is called right before an OpenCL compile is begun.
 --This required making RendererCLBase not a pure virtual base class. Member functions just return defaults.
 -Filter key presses on main window to only process the third one. This is due to Qt triggering three events for every key press.
 -The palette preview table was installing an event filter for seemingly no reason. Remove it.
 -Mark certain virtual functions as override in SpinBox and DoubleSpinBox.

Source/Fractorium/FractoriumEmberController.h

@@ -109,6 +109,7 @@ public:
 	virtual void PasteXmlOver() { }
 	virtual void CopySelectedXforms() { }
 	virtual void PasteSelectedXforms() { }
+	virtual void CopyKernel() { }
 	virtual void AddReflectiveSymmetry() { }//Tools.
 	virtual void AddRotationalSymmetry() { }
 	virtual void AddBothSymmetry() { }
@@ -184,7 +185,7 @@ public:
 	virtual void XformNameChanged(int row, int col) { }
 	virtual void XformAnimateChanged(int state) { }
 	virtual void FillXforms(int index = 0) { }
-    virtual void UpdateXformName(int index) { }
+	virtual void UpdateXformName(int index) { }
 
 	//Xforms Affine.
 	virtual void AffineSetHelper(double d, int index, bool pre) { }
@@ -210,6 +211,7 @@ public:
 	virtual void XformColorSpeedChanged(double d) { }
 	virtual void XformOpacityChanged(double d) { }
 	virtual void XformDirectColorChanged(double d) { }
+	virtual void SoloXformCheckBoxStateChanged(int state, int index) { }
 	virtual QColor ColorIndexToQColor(double d) { return QColor(); }
 
 	//Xforms Variations.
@@ -218,6 +220,7 @@ public:
 	virtual void ClearVariationsTree() { }
 	virtual void VariationSpinBoxValueChanged(double d) { }
 	virtual void FilteredVariations() { }
+	virtual void FillVariationTreeWithCurrentXform() { }
 
 	//Xforms Selection.
 
@@ -226,6 +229,7 @@ public:
 	virtual void XaosChanged(int x, int y, double val) { }
 	virtual void ClearXaos() { }
 	virtual void RandomXaos() { }
+	virtual void AddLayer(int xforms) { }
 
 	//Palette.
 	virtual size_t InitPaletteList(const QString& s) { return 0; }
@@ -375,6 +379,7 @@ public:
 	virtual void PasteXmlOver() override;
 	virtual void CopySelectedXforms() override;
 	virtual void PasteSelectedXforms() override;
+	virtual void CopyKernel() override;
 	virtual void AddReflectiveSymmetry() override;
 	virtual void AddRotationalSymmetry() override;
 	virtual void AddBothSymmetry() override;
@@ -451,7 +456,7 @@ public:
 	virtual void XformNameChanged(int row, int col) override;
 	virtual void XformAnimateChanged(int state) override;
 	virtual void FillXforms(int index = 0) override;
-    virtual void UpdateXformName(int index) override;
+	virtual void UpdateXformName(int index) override;
 	void FillWithXform(Xform<T>* xform);
 	Xform<T>* CurrentXform();
 	void UpdateXform(std::function<void(Xform<T>*, size_t, size_t)> func, eXformUpdate updateType = eXformUpdate::UPDATE_CURRENT, bool updateRender = true, eProcessAction action = eProcessAction::FULL_RENDER, size_t index = 0);
@@ -480,6 +485,7 @@ public:
 	virtual void XformColorSpeedChanged(double d) override;
 	virtual void XformOpacityChanged(double d) override;
 	virtual void XformDirectColorChanged(double d) override;
+	virtual void SoloXformCheckBoxStateChanged(int state, int index) override;
 	virtual QColor ColorIndexToQColor(double d) override;
 	void FillColorWithXform(Xform<T>* xform);
 
@@ -489,6 +495,7 @@ public:
 	virtual void ClearVariationsTree() override;
 	virtual void VariationSpinBoxValueChanged(double d) override;
 	virtual void FilteredVariations() override;
+	virtual void FillVariationTreeWithCurrentXform() override;
 	void FillVariationTreeWithXform(Xform<T>* xform);
 
 	//Xforms Xaos.
@@ -496,6 +503,7 @@ public:
 	virtual void XaosChanged(int x, int y, double val) override;
 	virtual void ClearXaos() override;
 	virtual void RandomXaos() override;
+	virtual void AddLayer(int xforms) override;
 
 	//Xforms Selection.
 	bool XformCheckboxAt(int i, std::function<void(QCheckBox*)> func);