With mouse events event->val started as 0/1 for press/release but later the tweak function made LMB and RMB zero value into KM_RELEASE, somehow MMB didnt get used by the tweak function so was left at 0 and the modal keymap function failed when comparing MMB Mouse ups.
now initialize event->val as KM_PRESS/KM_RELEASE
issues like Shift+R (repeat last) not giving capital R in the text
editor. There is also new modal handler list at the window level,
and the API call will always add it to that one now, since modal
handlers were not used in other levels.
The order used to be:
* window modal + keymap
* area modal + keymap
* region modal + keymap
Now it is:
* window modal
* region keymap
* area keymap
* window keymap
Note sure what to do with this one, and personally think
we should avoid using macros for this kind of thing:
V_GROW(edges);
source/blender/editors/mesh/loopcut.c:232: warning: value computed is not used
