Added new method `setSquareSize(double size)` to be able to customize the size of squares in `ColorPalette` which was previously hardcoded with a value 15
------------- Commit messages: - Merge branch 'openjdk:master' into 8358023.ColorPickerSquares - New setSquareSize method to configure the size of ColorPalette Changes: https://git.openjdk.org/jfx/pull/1954/files Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1954&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8358023 Stats: 58 lines in 1 file changed: 50 ins; 0 del; 8 mod Patch: https://git.openjdk.org/jfx/pull/1954.diff Fetch: git fetch https://git.openjdk.org/jfx.git pull/1954/head:pull/1954 PR: https://git.openjdk.org/jfx/pull/1954
