More stack trace filename search filters

We've released several new search filters to make it easier to find errors by the filenames in their
stack trace. If you've ever wanted to find client-side
Angular JavaScript errors that only occurred within
your own specific domain, or exceptions originating in a specific part of your code, keep reading.

You've always been able to search for errors where any filename contains a string, but now you can
also search for errors where:

• all filenames contain a string (allfiles:myproject)
• no filenames contain a string (nofiles:evilproject)
• the top stack frame's filename contains a string (topfile:mydomain.com)
• the bottom stack frame's filename contains a string (bottomfile:some_important_library)
• the number of filenames is within a range (minfiles:1 and/or maxfiles:10)
• any filename contains a string (file:.rb)

These filters can all be combined in a single query. If you forget which filters exist, mouse over
the ? next to the search box to see the help text.