Parse clipboard data only if string looks like JSON
(for better performance)
Also allow spaces before header comment and not suppress possible errors from validateOptions()
(#4)
Add filter field
(#6)
Use <textbox type="timed"> in Firefox 3.0 and older
(#6)
Update filter after changes
(#6)
Notify user about filtration (bacause added items may disappear)
(#6)
Double click on "Filter:" label to update filter
(#6)
Fix "not found" highlighting in Firefox 3.0 and older
(#6)
Disable filter, if nothing to search
(#6)
Add Ctrl+F hotkey to focus filter field
(#6)