Navigate to file improvement

[mmorhun]

It would be great to have some filters in Navigate to file widget:

1. include/exclude results by file extension. (For example include only *.java files or exclude *.class files from results)
2. Case sensitive/insensitive flag (checkbox)

[sleshchenko]

Also, I'd do automatically sorting of the result list by types which makes sense to open with the editor and which doesn't make. Like, it doesn't make sense to open with editor .class files or zip archives, so I'd put them to bottom of the result list.
See attachment where I tried to find OpenShiftInfrastructure class, and I have to type .java file extension evidently or skip all .class files.

[slemeur]

@vparfonov : We have #5330 and #4993 . Is this issue going to help towards on those goals too?

[vparfonov]

yes in some way it could help, but here more about filtering result