Refactor GUI

[andreock]

• Divide GUI class in more subclass that manage a single module GUI like WiFi, BLE, etc...
• Cleanup code from useless things
• Don't delete/init GUI every time to avoid memory fragmentation
• Try to make more generic the page routing(no functions for every page but something like an array of Page object that control page status)

[andreock]

https://github.com/CapibaraZero/fw/commit/c47cd5033e67c1f8e4bc1c3e8e48bbba9d633d58 Fixed GUI reinitialization