fuzzy search on all tabs

**Is your feature request related to a problem? Please describe.**

it would be extremely useful to have a fuzzy search system in copyq. I usually search for code snippet or other stuff with the search function, right now however this function searches only on the current tab. A way to do real fuzzy search on all the tabs at the same time would be incredibly useful for when one has many different tabs in which to search for the item.
In my specific use case i have many python snippets that are on different tabs related to different libraries. If i would like to search for an item that has 'np' in it (an abbreviation for a very popular python library) i would have to click on each tab to look for the appropriate snippet of code.

**Describe the solution you'd like**
it would be optimal to have an option to change the kind of search in the preferences, one will keep the current system while the other will use a system that when fuzzy searching will filter the items from all the sub-tabs of the current tab for the searched string.

**Describe alternatives you've considered**
I found and tried to use the copyq command that the author of this library released online, this however is extremely clunky to use with the necessity of calling it with a key combination ( instead of just starting to type) and having the results in a ulterior tab. Overall the most fundamental problem of the command is the inability to make the search fuzzy and real-time (you have to send the query by hitting return), this strongly limits the ability of using copyq as a snippet manager.