v.2.6.5

Added

1. Ctrl+Backspace in the base form will now delete the word (sequence of non-whitespace, non-punctuation chars) ending at the cursor location (partially address #55 )
2. Added optimizations to reduce the frequency of updating of the file list.
3. Added the ability to disable highlighting of the file list if the number of results is large (for better performance, partially address #56)
4. Made directory search more efficient by "remembering" whether search terms matched the top directory and thus avoiding the cost of performing unnecessary regex matches.
5. Keypress processing delay

Fixed

1. Performance issues for the huge file list.

Thanks @molsonkiko