Feature request: Rename sender tab and copy Hex in sender text

Hi, it's nice we could add multiple sender items. The name of them are set automatically as 1, 2, 3...
Hope I can rename each item name to my favorite.

When I copy a hex sequence, such as `11 22 33 AA BB CC` to sender text, it's taken as char string by default. Switch to hex mode, it converts `11` to `31 31`, thus I have to input hex array by hand every time.

A better way may be that copied data to sender text is taken as hex sequence in hex mode.

Thank you.

Start by locating the sender tab and sender-item naming entry points, then trace how copied text is inserted and how hex mode parses it. Confirm whether each sender item can receive a custom name and whether copied sequences such as `11 22 33 AA BB CC` remain hex data in hex mode; verify both behaviors in the sender interface.

Written by the indexing model from the issue text.