[ios] - strip off trailing carriage return when inserting text frome rem...

...ote to current active(native) keyboard.

@ulion for a comment. Before we always received the trailing carriage return which gets send from the official remote app when "closing" the keyboard by hitting the "enter" key. 

I think we never want that trailing carriage return (in my test case it prevents from inserting a valid new source for example cause the added path ends with "carriage" return and so the vfs will never be able to open it...).