fix: adjust settings tab element positions
fix: adjust texture pack tab element positions
fix: adjust mods`tab element positions
chg: replace credits with the link to github

There are several reasons for this change:
  - it's hugely outdated
  - no one ever updated this tab
  - is anyone actually interested in the full list?
fix: adjust create server tab element positions
Merge pull request #173 from donat-b/menu

Menu fixes