[interactiveconsole] Fix initial load selection
Summary:
QActionGroup has no signal for when an action within the group changes
checked state. Only when an action within is triggered.
Without calling trigger InteractiveConsole::modeSelectionChanged is not
triggered and m_mode is not updated.
BUG: 408787
Test Plan:
qdbus to launch the console
Execute button went to the right place
Reviewers: Plasma
Subscribers: plasma-devel
Tags: Plasma
Differential Revision: https://phabricator.kde.org/D21852