Note to write documentation
Add hasSelection
Add isCursorInSelection
Add clearSelection
Add selectedText/selection
Add selectLine
Refactor: center a widget centerWidget
Better excuse for bad convention
Better TextEdit docstring
Note @ doc @ catching mouse event
First step to catch mouse event
Basic mouse press & release catching
Disable context menu
Docstring @ mouseReleaseEvent
Correct behaviour for mouseReleaseEvent
Docstring for mousePressEvent
Add isOneMouseButtonAlreadyPressed
Add getMousePressedButtons
Basic mouse handling done
Disable default "middle-click to paste" if necessary