Add '4' hotkey to ovsdl.
Add '4' hotkey to ovsdl.

Dependent Libraries:
  libut      : 61957e0908c80123b256aef20c084feadcc7d5da
  liblog     : 1060c8cf36975796a3c56d19e40193657634587d
  librp      : c1fbc4130f08d63fca8ba112b624c7cda5a05e9d
  libil      : 2156b22485dc05c305074315e7f1f8f31783bcbf
  libsg      : 54d91e5672ee91dce8869489de954b19d3e15b68

etiam/ov,etiam/ov,etiam/ov,etiam/ov,etiam/ov