* Restored the Grease Pencil tools to the toolbar
Probably, if the reason they were commented out before was so that the repeat stuff is visible, we can swap the order of those two. Otherwise, it's good to have somewhere for the operators now (so that the hotkeys can be found)
* Hotkey displays in the tooltips now show the keymodifier too
For example, "D LeftMouse" or "Ctrl D LeftMouse" for the Grease Pencil operators, instead of just "LeftMouse" or "Ctrl LeftMouse".
Added an option for normalize_all that keeps the active group at its existing weight while normaling all other groups around it.
Thsi makes it easy to paint up to 100% where all other groups will use progressivly less until the active group is 100% and all others are 0.
Added weight operators to the toolbar
* Fix AAO showing Distance property even though it is not supported.
* Fix texture buttons not displaying texture stack from the node material.
* Small visual tweak to particle mode options.
