Block calls using regular expressions.

[meowtochondria]

Resolves #106

Example regular expression to block all calls from area code 412: (\+1 ?)?412[0-9-]{7,9}
Number formats this regex would block (as i am not sure what format underlying system exposes, I wrote an all encompassing regex):

+14121112222
+1 4121112222
+1 412-111-2222
+1412-111-2222
4121112222
412-111-2222

View it online: https://regex101.com/r/divSFw/1

Also adds a header to main page and settings page so as to distinguish them. Navigation was quite confusing after minimizing the app and not realizing which page i am on... as all pages are settings/toggles in various categories. Just adding header in 2 places has helped a lot.

[x13a]

Thank you very much for this @meowtochondria
Better later, than never.. Merging