Having colon in search returns all notes

@th-ros reported that having sort:dasc (typo of sort:desc) in search will return all notes.Embed any search - #28 by th-ros

It seems that just putting colon in any search will make Joplin return all notes (and it will ignore search query)

Screenshot from 2021-02-27 13-36-18

I will post issue if its bug, just checking now if its part of something else.