Solve some inadequate uses of 'contains()'
Solve some inadequate uses of 'contains()' that were mentioned on https://svnweb.freebsd.org/ports?view=revision&revision=478438, as they were quoted on Getting Krusader to work on OSX 10.14 (Mojave) and are not difficult to solve.
TEST PLAN
The behaviour of Krusader should not change after applying the proposed changes. Anyway, if anyone wants to perform some tests:
- Krusader can be utilized to create compressed files, to uncompress archives, to mount hard disk filesystems and to mount network filesystems.
- The mention to external applications can be changed in Konfigurator and tested.