Little addition to GPS data

[cicciobello]

I use sooo much times Tools > Metadata > Edit GPS data via hotkey.

I often need to clear the Latitude, Longitude and Altitude data, but I have to go to Tools > Metadata > Clean and uncheck all the checkboxes except GPS.

Q1. Is it possible to insert a button in the "Edit GPS Data" window to reset *only* the GPS data?
Q2. Is it possible to use the GPS tab to correct (a little) the GPS coordinates? Maybe with dragging the red dot.
Q3. In the "Edit GPS Data" window is it possible to have the image thumbnail a bit bigger?