[Editor] Editing values; some suggestions [usability; minor features]

[GoogleCodeExporter]

Editing values in the editor (e.g. camera properties) should accept ENTER key 
from the numpad too, since most people input values using that.
It would also be useful to add something which makes visually clearer when you 
are typing something and when you are not. The text cursor is not enough for 
good visibility.
Moreover, when selecting a value for the first time (first click), it should 
select all the value. Only when clicking again it should set the text cursor at 
the specific mouse position.
TAB works but SHIFT+TAB should also be made to work.

So, summing up:
* ENTER on numpad to confirm the value
* something (e.g. a different color) which helps you see if you're typing a new 
value
* selecting a value first click: select all the value
* selecting a value second click: set the text cursor
* SHIFT+TAB should loop through values going up

Original issue reported on code.google.com by [email protected] on 20 Aug 2013 at 6:50