Improve sorting in the track tables BPM Options submenu

Sort by the most used options and add some separators for clarity.
Also rename the submenu from BPM Settings > BPM Options. IMO this is
the more correct term since the menu contains the available options for
the BPM setting of a track.
applied patch from launchpad
Merge branch 'master' into mb_errorMessage
Move some needed vars into protected part of WOverview class
Move WOverview::drawNextPixmapPart() into new class WOverviewLMH
Cosmetic cleanup in woverview.h
HSV renderer for the woverview widget
Merge remote-tracking branch 'upstream/master'
Merge branch 'master' into mb_errorMessage
add new error page for general error and a service name not working
currently
Merge remote-tracking branch 'upstream/master'
Merge commit '87ea884419af41071c6a334a32a3d3b4e6222f38'
Merge branch 'mixxxdj/mixxx/tree/master' into 'esbrandt/mixxx/tree/master'

Conflicts:
	mixxx/src/widget/wtracktableview.cpp
Fix merge conflict from last commit
This adds the missing 2/3 and 4/4 BPM options to the BPM tab in the trackeditor window. It also adds some tooltips and fixes the tab order. Could use some wordsmithing on the tooltips though. Thanks.
Merge branch 'master' into mb_errorMessage
Error pages work, ui files need some work
Merge remote-tracking branch 'upstream/master'
Merge branch 'master' into mb_errorMessage
Arrange BPM buttons in track editor in 1 2x2 grid
prevent playlist reordering when it is locked