Left Menu Improvements suggestions

1 - set the menu to automatically be collapsable or not. I really dislike that once I expand the menu to enter a submenu, the menu stays expanded forever. Sometimes I need to waste time “CLOSING” all the expanded menus, just for it to be usable again

2 - color palette to change background (and maybe font) of the automatically created First Letter Icons on the menu. Right now, all menu icons are grey.
The color should be inherited by submenus

3 - maybe some icon set for the menus? Like font awesome?