A minor OMEdit improvement

[ceraolo]

The Variables Browser contains an edit field for searching variables, which is very useful.
Once a variable is searched and one want to search another, currently one has to first delete the old searched text, then write the new one.

I propose to automatically select the text of the edit field when the field is entered, so that for a new search one can directly write the new search text.

This is a minor improvement, since the advantage is just saving of a few keystrokes. I opened this ticket just because I expect the fix to be very straightforward.

[adeas31]

You know that pressing the ESC key will clear the edit field.

[adeas31]

#3987