Input fields should warn about illegal input

Some input fields allow to input characters which are invalid.

Examples:

• The Git remotes -> Add... dialog allows to paste input from the clipboard with trailing whitespace (in my case, it was a carriage return) which is rejected after pressing Ok (no remote was added). The same may apply for the remotes name.

• The Projects -> Build & Run -> Run -> Add Custom Executeable input field also allows trailing whitespaces without complaint. On trying to run this executeable, you just get "No exceutable specified".

• There may be more fields of this kind, but these two hit me the last two days.

It takes some time to realize what's going on as the feedback (something doesn't work) is far away from the input dialog.

Input fields taking paths or URLs should at least warn about illegal characters.