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- Don't clear the search entry when pressing the global search button
- Start a search automatically after pressing the button

Fixes #10134.

Logo without text is used, because it wasn't readable in the GUI anyway.
Part of #9049.

The event gets raised when we receive the presence reflection

Idle status changes while disconnected were lost leading to reconnecting
or resuming with the idle status we had before disconnect

Fixes #10016

Information is already provided by tab title.

Information is already provided by window title.

Part of #8787.

The default language cannot be `None` if `app.is_installed('GSPELL')` is `True`,
because to be `True` at least one language needs to be available.

If `app.is_installed('GSPELL')` is `False`, the modified code is not called.

Fixes #10125