New config parsing

Improved config handling and parsing.

Quick Notes

• Move graph configuration to its own tab.
• Auto Index via Layout does not work in non live mode.
• Consider removing detached graph mode.
• Warn and prevent configurations without any panels from being created (MainDialog).
• Warn and prevent configurations without any panels from being created (LayoutDialog).
• Update text in update update rate dialog.
• Ensure window icons are applied where relevant.
• Position parsing and writing.
• Check if the parse exception is used.
• Double check the x-pos computation algorithm (seems off by one for the initial key panel sometimes).
• Path setting validation.
• Table panel for keys dialog.
• Keys dialog updates are not in real time.
• Reorder menu items.
• Diff changes before merging this (because after would be a pain)

fix issue #252 (closed), #262 (closed), #186 (closed), #147 (closed), #237 (closed), #146 (closed), #204 (closed)