WL-3116 Show locations without meetings present

Currently if there are no meetings upcoming the locations will not be
populated in the drop down box, even if there have been locations
previously saved.

This fix actually populates the list of available locations and checks
whether it is empty, instead of checking that no meetings are available.
Merge pull request #21 from ox-it/WL-3116

WL-3116 Show locations without meetings present