[atlas] MacOSX: probe add problems (create measurements)

Goodday, I'm trying to add some new measurements, but the probe selection's "+New Set - Manual" and "+Reuse a set from an old Measurement" both just flash the screen, looks like it opens a drop down windows, and closes it before I could even blink my eyes. This was tested on the Firefox 35.0.1 as well as on Safari 7.0.3 on MacOSX 10.9.3. Hendrik