BUG: 395390
Place Kickoff in a vertical panel. Restart plasmashell and open Kickoff.
Before fix: first tab is positioned out of bounds (y<0).
After fix: first tab is positioned correctly (y=0).
BUG: 393888
Change panel orientation from horizontal to vertical. Open Kickoff.
Before fix: tab bar fills the whole view making the Kickoff unusable even if you make the panel horizontal again.
After fix: tab bar has the correct size.