Add option to filter out character types

[charlesbrandt]

In Settings, allow users to specify a custom field of characters to filter out when copying tabs.

Example: Sometimes tabs that are asleep get prefixed with

https://github.com/charlesbrandt/copy_all_tabs/releases  
💤 Releases · charlesbrandt/copy_all_tabs  

The "💤 " does not add value after being copied and clutters notes.

Could also toggle a common range of characters like:

• all emojis: https://unicode.org/emoji/charts/full-emoji-list.html