ProjectManagerView filter with 'exclude' matching

First enhancement is exclude-filtering.
Filters started with '!' treated as excludes
For example, for in-source-build Qt projects I use "*.cpp *.h *.pro !moc" in order to see C++ sources and do not see and MOC-generated files

Second enhancement is about how rules are applied:
if rule have no special matching symbols '*' and '!' the rule treated as prefixed search. For instance, the following rules are equal:
!moc' == '!moc*'

Patch by Eugene Agafonov

REVIEW: 101425