Logic to convert double-click events into press events wasn't running
in the case an operator had a modal keymap, causing bevel for e.g.
to ignore keys pressed quickly.
Change event handling logic so modal handlers never
receive double click events, so checks for press/release are reliable.
While this is an old issue for mouse events in practice it wasn't
a problem since the first event typically executed/canceled.
Support for keyboard double-click exposed the problem
for all modal operators that take numeric input.
0920c1684b