Please add the option (field) to search for filters by the Filter ID. 

From this page: https://brierley.atlassian.net/jira/filters

This would enable a much more powerful search.  Often when linking to a Filter only the filter number is displayed and not the Filter name.  This is really important because a number of the gadgets in Jira/Confluence require the Filter Name not the Filter Number to pull in the results. 

Something like this: 

Example of view without the Filter Name when clicking from a Gadget in Jira: