Fix crash in Konsole KPart

[Ahmad Samir]

Hello.

These two commits (both are required) should fix a crash in Dolphin that happens when you open the 
terminal panel then try to close it via "close session" from the right click menu.

https://invent.kde.org/utilities/konsole/-/commit/9b9c204c192e8893ca80aa9d93f77b79111ebe5c
https://invent.kde.org/utilities/konsole/-/commit/b193b8b1242d1570361d2388c475b5a619c19afe


The bug was reported at:
https://bugs.kde.org/show_bug.cgi?id=429538

-- 
Ahmad Samir