Polish server/index.html
Polish server/index.html

- Inputs requiring only numerals are restricted to such.
- Numeral inputs with minimum and maximum values are restricted to such.
- IP address input validation.
- Inputs that only accept boolean 0/1 replaced with Yes/no or enabled/disabled dropdowns
- General design polish

mkrl/cfgtf,mkrl/cfgtf,mkrl/cfgtf,mkrl/cfgtf