Bionic uses an old QT5 version compared to Debian10, build fails

Created by: stdevPavelmc

Describe the bug When compiling from vanilla Ubuntu bionic it fails because of this:

./ui_mainwindow.h:94:25: error: ‘class QAction’ has no member named ‘setShortcutVisibleInContextMenu’; did you mean ‘setShortcutContext’?

See the travis build log here: https://travis-ci.org/llamaret/MystiQ/jobs/612000844

Expected behavior not to crash

Possible Fix In this link https://github.com/rerrahkr/BambooTracker/issues/28 are dealing with the same issue and the fix is on https://github.com/rerrahkr/BambooTracker/commit/8c3f2b71e782334c3fd2570c7b6532f5fc6d1073

So fix will be prepare the code to compile it conditionally on the QT5 version, @llamaret this is your...