Fix kicker and kickoff search result action menu crash
Right now in master, kickoff and kicker crash with a seg fault when right clicking on a search result in kickoff or kicker.
Repro steps in kickoff:
- Open kickoff application menu
- Start searching for something
- Right click on a search result
- Crash
Similar steps cause a crash in kicker too and under the computer section in kickoff places.
After some digging it seems like !1505 (merged) updated the appletInterface property for the main rootModel object but didn't update it for runnerModel and computerModel.
This causes a seg fault here as applet is NULL.
This is my first PR to KDE so apologies if I needed to create a bug in Bugzilla first or made any other mistakes!