Entity inspector doesn't handle multiple entities correctly

[haslersn]

Steps to reproduce:

• Spawn two Marios within the same cell
• Inspect them
• Call move via the inspector
• Chose the other Mario from the drop down menu
• Call move via the inspector again

The same Mario will move twice instead of both of them once.

[buehlefs]

Issue was the dropdown box not handling selected index correctly for equal string entries