Update FlatLaf from 2.3 to 2.4

[DevCharly]

Update FlatLaf to v2.4.

Changes: https://github.com/JFormDesigner/FlatLaf/releases/tag/2.4

This version fixes issue #4231 (Netbeans 14 freezes spuriously when r-clicking at Design View)

It brings also some usability improvements to the window title bar (on Windows 10/11):

• There are now additional areas at top of embedded menu bar to resize the window. This makes it easier to resize small frames with lot of menus. (see red rectangles in below screenshot)
• The window title now has a minimum width, which avoids that it is completely hidden. The window title is important because it is needed to move the window. (green rectangle)

[mbien]

awesome, the context menu fix is an important one - otherwise we would have to turn the FlatLaf submenu tweaks off to avoid freezes. Thanks for fixing this upstream on such short notice.

[eirikbakke]

This is great; thanks for the latest update!