Add the ability to batch add extensions for types on the "Search types" or "Edit search type" screens

[Korb]

Is your feature request related to a problem? Please describe.
Adding dozens of extensions one by one for each type is a very tedious task. Especially considering that after each action (adding a new input field or adding a new value) the list is scrolled to its beginning.

Describe the solution you'd like
I propose to add the ability to import a plain text file with a list of extensions (separated by a line break, comma, semicolon, or pipe).

Describe alternatives you've considered
Implement the extension list in the same way as the value of the Skiplist share (don't share the following files (separate files with '|', wildcards allowed)) field in the Sharing options tab of the application settings.