* ModestAccountMgr: the account manager is just a facade to the configuration...

    * ModestAccountMgr: the account manager is just a facade to the configuration system, so it should
not know TnyAccounts only ModestAccounts. TnyAccounts are managed by the TnyAccountStore
        - removed the server_account parametter from the account_removed signal
        - removed the server_account parametter from the remove_account method
        - Changed the signature of the methods that handled the signal
        - completetly rewritten the account removal code
        * ModestTnyAccountStore
        - now it issues a account_removed for both the store and the transport account
        - completety rewritten the get_server_account method, it makes no sense to use the account mgr, because we h
ave the accounts
        * ModestFolderView
        - added a missing check
        - added a missing select inbox
	- added a condition to the filter_row method, do not take into account the visible_account_id if we aren't in SHOW_ONE style

pmo-trunk-r2774