on xp'ed mode and switching configurations: save raw mode instead of tog...

...gling filter mode in tabs since their status is unknown and dealt with by the Wizard. Fixes #11848 

Please test and review @jnfrmarks @craigpg @PVince81 @butonic 

reproduction steps in #11848 (mind https://github.com/owncloud/core/issues/11848#issuecomment-60970126)