Google Analytics Panel UI

Fix UA code validation, fixed wrong comment

Also duplicates commits due to weird diff:
https://github.com/KSHSK/WAVED/commit/c0ae403c34736bbc3879736178d1557bff
e85432
https://github.com/KSHSK/WAVED/commit/1c7db0ebf5ade16e68b4e8e0da653d989d
36665f
https://github.com/KSHSK/WAVED/commit/97d479125eb2a08b5dd2ac953450230fc2
55bace
https://github.com/KSHSK/WAVED/commit/f34724c58b7c9d3b289170629248fc6821
f0c17b