Update WiFi/Cell signal icons

[Teddible]

They should be updated to be thicker/rounder. The current icons look so outdated compared to a lot of other OS skins.

[Tg1016]

I had a suggestion that the icons should be a little bigger to match the size of the new battery icon. As shown in my screenshot, they could definitely make the icons a bit bigger to match the battery icon and make it the same on the left side with the clock and notification icons as well.