- there is no thin font available on Windows
- previously used "Segoe UI Light" for `thin.font` and "Segoe UI Semilight" for `light.font`, but "Segoe UI Semilight" is too close to regular font so that it is better to use "Segoe UI Light" for `light.font` and drop `thin.font`
- the usefulness of having thin font in addition to light font is low
on macOS use "HelveticaNeue-Thin" for `light.font` (instead of "HelveticaNeue-Light")
- enabled `TitlePane.unifiedBackground` by default (because seems to be standard on Windows 11)
- no longer paint a bottom separator for the menu bar (if unified background is enabled)
- added `Component.accentColor`
- dark themes: changed threshold for contrast() from 39% down to 25% for better readability of text
- Demo: added "Default" accent color and changed "Blue" to lighter color
(issue #233)
- moved focus listener to class `Handler`
- instead of repainting content border in `repaintContentBorder()`, increase size of repaint region in `repaintTab()` to include part of content border
- simplified `paintContentBorder()` by using `getTabBounds()` and `Rectangle2D.intersect()` to compute gap rectangle
- slightly make code smaller
- minor formatting, renaming, ...
- renamed FlatSVGIcon.setFilter(...) to setColorFilter()
- renamed ColorFilter.setFilter(Function) to setMapper(Function)
- replaced ColorFilter.createGrayFilterFunction(int,int,int) with universal createRGBImageFilterFunction(RGBImageFilter)
- ColorFilter: use default color palette mapping only in global filter
- keep "Options > Window decorations" selected for JetBrains Runtime
- disable "Options > Use underline menu selection" on macOS
- added font size `11`
- API to check whether current platform supports window decorations `FlatLaf.supportsNativeWindowDecorations()`
- API to toggle window decorations of all windows `FlatLaf.setUseNativeWindowDecorations(boolean)`
- `FlatClientProperties.USE_WINDOW_DECORATIONS` can now used to toggle window decorations for single window
- cleaned-up/fixed/simplified window decorations "enabled" checking:
1. if `FlatSystemProperties.USE_WINDOW_DECORATIONS` is set, its value is used
2. if `FlatClientProperties.USE_WINDOW_DECORATIONS` is set, its value is used
3. use value of UI default `TitlePane.useWindowDecorations`
The menu items for custom window decorations and embeded menu bar aren't selected anymore if the feature isn't supported.
On top of that, there's now a tooltip indicating that these aren't supported.
