It is useful when writing/debugging particular tests file or investigating test failures.
Doing it by selecting desired tests from list is too long and error prone (need to get all tests' names, find and select them).
If current file is not a test then do nothing or run all tests.
|For Gerrit Dashboard: QTCREATORBUG-20329|
|228767,5||AutoTest: Add action to run all tests from current file||master||qt-creator/qt-creator||Status: MERGED||+2||0|