Thanks flip.
So basically My work flow is like this, I create files (images, videos, gifs) and while I save them I just remember thier name while saving and in the other desktop, where I have to upload I open the open dialog box and in listary there is a search box in the bottom I just type the first few letters and it comes up.
It is really handy.
I tried default box but the search option came after some keyboard shortcut rather than attached to the open dialog boz or may be I missed something.
Also I am not a mouse person, I like to remain on keyboard, default box had many options but it looked like a lot of mouse movement to me.
Would be grateful if you could guide on this.