Blender Git Loki

Fix T83559: File Browser uses wrong operation

When opening a temporary File Browser, we have to make sure the file selection
parameters are refreshed. When opening it in a new Window that would always be
the case, if the File Browser uses a maximized window (as set in the
Preferences), it might reuse space-data from a previous use. So we have to
force the refresh.
Also renamed the relevant function to be more clear about what it's doing.

Mistake in 95b3c4c966f9.