Disable menu actions when read-only/locked

Summary:
This patch addresses the following points:

• Ignore most DBus methods
• Disable the following actions:

clear-history, clear-history-and-reset, edit-current-profile, switch-profile
adjust-history, send-signal, zmodem-upload, edit-rename (tab bar)

• Session updates all views correctly when readonly changes

Test Plan:

• Actions do not show when locked
• DBus methods are ignored when locked
• Multiple views in one session get correctly updated

Reviewers: hindenburg, Konsole

Reviewed By: hindenburg, Konsole

Subscribers: ngraham, hindenburg, Konsole

Tags: Konsole

Differential Revision: https://phabricator.kde.org/D11341