Fix slow library search on sqlite 3.8.
Automatic merge of translations from Transifex (https://www.transifex.com/projects/p/clementine/resource/clementineplayer)
Add explanatory comment to last commit.
Merge pull request #4285 from paperbagcorner/sqlite-3.8

Fix slow library search on sqlite 3.8.
Bump changelog for 1.2.3
Try to make the slider more accurate when moodbar is activated.
Previously, the slide wasn't displayed at the exact position where the user clicked, and the moodbar's width was equal to the slider's width, while it should have been as long as long the groove.
Very minor style change
Add more things to the 1.2.3 changelog
Recursively add songs in subdirectories to the organise dialog.  Broken in revision 35060d6.
Switch from foreach to for
Load songs in a background thread while initialising the Organise dialog
Try out actually using lambdas for something useful.