Size adjustments for moved-back repo icon

* make Commons icon slightly larger than "use this file" icon so
  it seems to be the same size (since the Commons icon has more
  whitespace)
* re-add size adjustments for dynamic icon; IIRC this was needed
  to make Wikipedia icons look good

Change-Id: I6cc2c66beb1d270c9367446661ef14139afa814e