Add support for copying themes.
Store copy of theme inside of stack.
Store copy of theme in render thread.
Use theme when generating previews.
Make render background a member function.
Render theme foreground onto background.
Always draw background in stack.
Replace stylesheet with palette for themes.
Add option to blur background behind foreground.
Add option to draw shadow behind foreground.
Merge theme render functions.
Make theme previews be scaled down images.
Use Lorem Ipsum text in theme preview.
Add zoomed text cutout to theme previews.
Disable foreground width when set to stretched.
Remember location when importing and exporting themes.
Add ability to clone themes.
Share thread based theme rendering.
Replace tabs with groupboxes in theme dialog.
Split margins out of foreground.