Fix duplication of msgctxt strings in PO files
Review Request #109506 - Created March 15, 2013 and discarded
Current comments in tr() lead to the cration of invalid formatting in PO files. See: ftp://l10n.kde.org/130315.trunk_l10n-kde4 This patch converts code references into valid "#:" comments like in other KDE applications.
Tested using the common procedure from https://techbase.kde.org/Development/Tutorials/Localization/i18n_Build_Systems#Testing_your_Messages.sh_script on Ukrainian translation. Works as expected.