Now that we have a two-stages GL context creation sequence, we can move
the profile to a pre-realize option, like the debug and forward
compatibility bits, or the GL version to use.
We should remove the mir and cairo surface before rendering the
transient_for, which will regenerate the cairo surface anyways.
Otherwise, we end up releasing both, when we only really want to get rid
of the mir surface.
Mouse over a parent menu[bar] didn't work while the menu was open.
The fix was to correct the behaviour of pointer crossing events so that
the pointer appears to be only inside one window at a time.
See: http://tronche.com/gui/x/xlib/events/window-entry-exit/normal.html
It's unused. At the same time, rename "begin_paint_region" to
"begin_paint". This will help us clean up how GDK painting works
in the future to allow more creative use of double-buffering.
Store the cursor name on the cursor (rather than always using its type).
Use this when setting a cursor on a surface.
The mir server will fallback to using standard cursors from the cursor
theme if the name used is not one of those defined by mir, which is more
or less what we want to happen here in case of creating a cursor by
name.
