easy way to make file switching more convenient

In the fullness of time, I'll want to remember previous file, type to
filter, etc. But for now just don't forget where you were. This is
helpful because I'm often working on either the run side or the source
side, and just starting out on the right side shaves off a lot of
keypresses.

source.lua

@@ -343,7 +343,6 @@ function source.keychord_pressed(chord, key)
   end
   if chord == 'C-g' then
     Show_file_navigator = true
-    File_navigation.index = 1
     return
   end
   if Focus == 'edit' then