Modifies indentation behaviours

Partially fixes #14559 (see the issue for details);
Removes some code redondancy ;
Adds the possibility to indent left and right without selecting text ;
Adds the entries to the context menu when text is not selected ;
Renames indent_selection_left() and indent_selection_right() to indent_left() and indent_right() ;
Unifies context menus of shader text editor and script text editor.

0 files changed, 0 insertions, 0 deletions