A new menu and compton support smooth FyneDesk design

Various feature additions alongside support for the compton compositor and a new menu make this FyneDesk feel much smoother :).
We hope you like this update which also contains many speed and stability improvements.

Added

• Basic compositor support using compton backend
• Support brightnessctl support to brightness module
• Add a helper menu to each window
• Add network status module that uses connman-gtk to configure
• Add support for starting the Fyne Calculator (if installed) using the "calc" button on supported keyboards

Changed

• Default terminal is now fyneterm (if installed) :)
• Update Fyne to 2.1 and refresh UI to match
• Improved switcher UI
• Re-designed the main menu to include links to standard apps

Fixed

• Show 1.0 as default scale in Advanced settings page if none set
• Closing windows could leak resources to invisible windows
• Don't drag the window if tap starts on a button
• Global shortcuts did not work in some windows and menus
• Improved stability when switching apps or showing many windows
• Compilation on FreeBSD 13 failed due to dbus issue
• Removed FreeBSD requirement on installed glfw library dependency