[#655] fix: fix DRep registration when the DRep name is longer

[MSzalowski]

List of changes

• Change style of url button to trim the file name
• Change regex for parsing urls to match urls without protocol

Checklist

• related issue
• My changes generate no new warnings
• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the changelog
• I have added tests that prove my fix is effective or that my feature works