- searchLineEdit: proper clearing
- locationBar content will not affect searchLineEdit size

It closes the other part of #3161.

It partially closes #3161.

Add a third query with fuzzy search enabled for every word. (We could also add other searches with lower fuzzyness if the first try fails)

Try a second musicbrainz query if the first one failed. This allows for fuzzier matches (like not taking spaces into account in 1980 - 1990 for example) but still doesn't fix issues with minor spelling errors.

Attach the vout object to parent before spu creation so modules loaded by spu can use var inheritance.

(TODO: add one item per X RandR view port)

This simplifies callbacks a bit, and fixes a race condition.

it is needed to pass from input_item_t to playlist_item_t
 for this variable only (others directly provide playlist_item_t)