Hotspot password defaults to a hard-coded string

While testing the touch hotspot feature ( currently in silo-046 ) on krillin ( stable, #24 ) and arale ( rc-proposed, #58 ), I noticed that a default password is populated for the hotspot, and it appears to be hard-coded to the string "89fjt93p".

This is pretty easy to repeat.

1. Goto Hotspot screen
2. Click Change password/setup
3. Click "show password"

Expected result:
The password field has a hint, but is not pre-populated

Actual result:
The password field is populated with the string "89fjt93p"