[Feature] Change Filter Type

**Introduction**
Right now if you want to create new filter `\create_filter` it will clean all previous search results.

**Description**
Consider the following options:
- New command `\change_filter_type` to change filter type.
- Addition question for `\create_filter` if search results are not empty. Something like:
- - `Do you want to continue search among found results? (yes/no)`
- - Or `Do you want to start new search or continue search among found results?` And provide two options (`1` - New search, `2` - Continue search).