Possible to limit how many filters can be seen

Possible to limit how many filters can be seen

Currently, I do have a problem, with all the views currently in our installation. Thee are to many, and did takes rather long to find the one needed.

I have thought of 3 possible solutions, but as far as I can see, none of them is possible.
However, I am not sure if it not possible, or I just can't find out how to do it, so I'll just ask the questions:

1. There are some views that are builtin, for example: My overdue requests, Requests pending my approval and so on. Is it possible to delete these ?

2. Is it possible to rearrange, the groups of views? Is it possible to list "my views" first, and then My Groups and then requests ?

3. Is it possible, to select a view to be only visible for a certain group of technicans ?

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