User defined views

[PauliusKu]

I, as a User, want to make custom filtering, sorting on a selected table and save it, so I can quickly access it later.

User flow:

1. User opens query for selected table.
2. User can make these adjustments: write custom query, sort, filter, select specific fields in fields table.
3. user click Save to Defined views button.
4. User is asked to enter a name for this view.
5. After saving, user can see this custom view in a new Custom views list below tables list.
6. User can click this custom and instantly run query editor with all previously selected adjustments.
7. User can delete and rename custom views.

[PauliusKu]

Start after #503 is implemented