Ignore .qmake.stash

Qt5 qmake seems to leave this handing around
FileManager UnitTest back on
Better output for signal failures
Set correct component ID

Need to disambiguate from video stream messages
Silence release build compiler warning
Bump signal wait time

When unit tests are being run in TeamCity the host box can end up being
very bogged down with other builds. So need to up wait time, to take
into account CPUs grinding.
Merge pull request #786 from DonLakeFlyer/FileManagerUT

File manager Unit Test back on