DiagnosticsView: add actions to the Tools menu
Grouped in a KMenuAction "Diagnostics View". Otherwise those actions aren't discoverable unless you happen to see them in the configure-keyboard-shortcuts dialog.
Add a ui.rc file for diagnosticsview.
Add icons for a the rest of the actions.
Associate the actions' shortcuts with the diagnostics view and the viewmanager, but not the mainwindow (like what is already done for other components/plugins).