Explore migration to QML

[christianparpart]

Challenges

• [ ] Actually making use of QML with custom OpenGL widgets seems very hard (to me!)
• [ ] how to set minimum item size (no setMinimumSize)
• [ ] no access to logical/physical DPI information?
• [ ] No updateGeometry()?
• [ ] How to implement toggling the titlebar (feature)?
• [ ] how to QApplication::beep()
• [ ] How to create a QMessageBox::question equivalent in QML that yields a result on what button was pressed?

Motivations

• [ ] Have terminal view as QML object, including its scrollbar and potential overlays (scrollbar, error messages) all defined from within QML source.
• [ ] Have tabs and have them in the main title bar and have them styled and colorizable, movable
• [ ] have split views