Enable searching for tracks in a range of bpms

[Owen Williams]

It would be nice to search for tracks of a certain bpm range. Here's a patch that does it!

Just type a term in the form "120-140" (no spaces) in the search box. The patch looks for the hyphen and then looks for two integers on either side. If any of these requirements isn't satisfied the term is treated as a regular search term.

[Owen Williams (ywwg)]

Whoops typo, forgot to initialize a variable.

[jus (jus)]

Thanks Owen, tested and works like a charm.

[RJ Skerry-Ryan (rryan)]

The patch looks good to me except I'd prefer that we make the user be a little more explicit about searching by BPM.

Bart did some work on this for his GSoC project but it hasn't been merged yet. So that people don't have to learn the new way when his branch merges, I think it'd be better if this patch matched the behavior of the advanced search branch.

Doing this just means checking for a "bpm:" prefix. For example:

[com truise bpm:110-120]

[RJ Skerry-Ryan (rryan)]

Trunk now has the ability to do queries like:

bpm:140.5-150.235
bpm:>140
bpm:<=140
bpm:>140.5

[Swiftb0y (swiftb0y)]

Mixxx now uses GitHub for bug tracking. This bug has been migrated to:
https://github.com/mixxxdj/mixxx/issues/6283