Update String property field only when text has changed
Update String property field only when text has changed

Avoids resetting the cursor position when the inspector updates while
editing a string property.

Fixes #42488

(cherry picked from commit c064378f954346c0e37252cf785878fe5c7bb633)

ex/godot,ex/godot,ex/godot,ex/godot,ex/godot,ex/godot,ex/godot,ex/godot