* Fixes NB#59753, the account that is created is now visible if it's the unique...

	* Fixes NB#59753, the account that is created is now visible if it's the unique account
	* The visible account key is removed if the currently visible account is deleted
	* the View->AccountX option to view a particular account works again
	* Fixed a bug when opening messages that are already opened
	* The folder view now listens to account-remove signal
	* refactored modest_tny_account_store_get_tny_account_by_* in a single function
	* Fixed a bug when removing the visible account, now the default one is selected as the new visible account

pmo-trunk-r2198