by showing redo panel.
The A hotkey has "auto iteration" enabled by default,
which calculates the number of times to run the filter
using a heuristic based on vertex count.
To make clear to the user what is going on the redo
panel is now shown for the mask filter operator.
NOTE: I discovered the source of the bug where sculpt
operators' redo panels were greyed out. The name
fed to SCULPT_undo_push_begin must match the operator
name. I've added a comment in sculpt_intern explaining
this.
185d9627b3
