Blender Git Loki

* Move view pie to sticky space (to avoid clashes with many add-ons)
* Fix naming

add ui_radial_dir_to_num lookup to avoid long switch ()

Fix tooltips for numpad numbering

use macro for numpad direction & deduplicate

Numbers appear on pie menu items, showing which number corresponds to
them

Pie menus:

Numeric input support.

After a bit of thought, I chose a scheme based on directions, starting
from top and going clockwise. We count empty positions too, so each
number from 1-8 is bound to a specific direction. There are no text
indicators on the menu items yet for the numbers.

Clamp pies against window borders only, not screen borders.

Added after Dalai's suggestion. Initially i was against this but
clamping against editor area makes pies feel cramped indeed and more
often than not causes a shift in the spawned menu position.

It's not 100% certain still we'll keep this, but having a nice commit
with the feature is not bad either.

small cleanup against mater to avoid conflict when merge-testing with multiview

Only modify outline of selected pie items.

Proper fix for previous fix (tm)

Manipulator property toggle did not work. Add toggle operator instead

Proper fix of tooltips not exiting

Fix tooltip sticking to button

Pies:

* Fix issue with repositioned pie menus
* Reduce default animation time

Change to pie iinteraction:

After discussion with Campbell use combination of drag/click style
interaction and ommit option:

If initial button is released while the menu is still within the
threshold then switch to click style. If not then do regular selection.

Use UI_DPI_WINDOW_FAC define

Pie radius scales correctly with DPI

Bring back good ole regular menu here so people can use number
accelerators as they are used to.

Revert "Pie Menus:"

This reverts commit 0d92435a71b8dfe7896a5f28b0ac778fdf383e15.

The reason is that the operator needs greater changes for this to work
correctly, may even better to have a new operator for this operation

Pie Menus:

* Editmesh selection pie can spawn combinations.

* Remove extraneous flag from operators.