Bug 450541

SUMMARY
In the event summary in the main window, the calendar name is always automatically altered. If the calendar is named "foo", the summary displays "Calendar: My foo", i.e., the calendar name is prefixed with "My".
(see for instance https://cdn.kde.org/screenshots/korganizer/korganizer.png)
=> This is forced on the user.
=> This brings no readability improvement, and easily breaks (for instance if naming a calendar after one's child).
=> It is even worse in languages where there is a pronominal distinction between singular and plural or between genders. For instance in French ("My" => "Mon / Ma / Mes") and German ("My" => "Mein / Meine"). That is borderline unreadable.

STEPS TO REPRODUCE
1. Create any event in the "foo" calendar.
2. Select it.

OBSERVED RESULT
"Calendar: My foo"

EXPECTED RESULT
"Calendar: foo"

SOFTWARE/OS VERSIONS
KDE Plasma Version: 5.23.5
KDE Frameworks Version: 5.90.0
Qt Version: 5.15.2