[Trunk] Different time signatures should be listed vertically during score creation

1. 'New...'.
2. Click 'Continue' until 'Create Time Signature' step.

Desired result: Different time signatures (numeric, common time and alla breve) should be listed vertically.
Actual result: The different time signatures are listed on the same line.

Discussion: Being listed on the same line could cause confusion.

Using MuseScore 2.0 Nightly Build (5091) - Mac 10.6.8.