Bugs
~~~~
- 

Missing Features
~~~~~~~~~~~~~~~~
- application menu
     - FMenuBar()
     - FPopupMenu()

- list/tree view with Columns
     - FListView()
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     /
     ├──► bin
     ├──▼ usr
     │  ├──► bin
     │  ├──► lib
     │  └──► local
     └──► tmp
---------------------------------------

- Multiple lines support for FLabel
- Add a window switcher on the right side of the status bar
- Add a scrolling area with on-demand scroll bars for FButtonGroup