OpenGL: wm_gesture uses new imm mode

D2376 by @ianwill, part of T49043
review by @merwin

Box select, circle select, etc. Introducing the dashed-line shader! See D2376 for more info.

OpenGL: wm_gesture uses new imm mode

D2376 by @ianwill, part of T49043
review by @merwin

Box select, circle select, etc. Introducing the dashed-line shader! See D2376 for more info.

Improvements to tab -> spaces conversions and use in the Text Editor:
- A single undo removes all 4 inserted spaces at once.
- Indent and unindent now use spaces.

The number of spaces is still hardcoded as 4. PS: Campbell sharing a couple of the minor todo's with me, thanks :).

== Python: Space Handler Scriptlinks ==

Bugfix (patch #18216)

I made a mistake on my previous try to fix this. I fixed something, tested, decided I should move the call to run spacehandlers to a better place, but missed removing the old call (ugh). Thanks Steven Truppe (rocketmagnet) for emailing me about it and for the patch.

== Scripts ==

- Scripts Help Browser: error parsing doc info wrapped in triple single quotes, like done in the 3ds importer. Thanks Jean-Michel (jms) for informing me about it.

== Scripts ==

- Scripts Help Browser: Brendon Murphy requested and Kevin Morgan implemented a "run script" button.
- AC3D importer: option to store emis color from .ac file in mirror color in Blender (the exporter has the option to export mirror color as emis). Patch by Francesco Brisa.

Thanks for the contributions.

== RNA ==

Ongoing work in rna_ipo.c: wrapping BPoint and BezTriple, since they are used in IpoCurve.

These are declared in DNA_curve_types.h, so rna_curve.c is a better place for them. I prefer to test things better and have someone who knows well this data check the wrapping first, though.

The 'struct' keyword was missing, breaking compilation here (scons).

== Python Space Handlers ==

- Old feature request: now space handlers can report release events, too. For that a new space handler type was added, here's the header for it:

# SPACEHANDLER.VIEW3D.EVENT.ALL

These scripts report both "presses and releases". For release events, Blender.eventValue is zero and Blender.link == Blender.SpaceHandlers.VIEW3D_EVENT_RELEASE. Check the API_related bpy doc for more info.

- Bug fix: left mouse clicks could be reported twice.

Important: for both the feature and the fix, to make the code nicer and to let space handlers become available in more situations, I moved the check for space handlers in space.c. Now it happens before checks for grease pencil, sculpt and left/right mouse button swapping. If this causes any problem (it shouldn't), please report.

PS: Thanks to Steven Truppe, who asked for this and even sent me a patch, but to preserve compatibility with existing event space handler scripts I did things in a different way.

RNA

* Tiny updates/fixes to Ipo wrapping.