Async Webui and fixes

[bmorcelli]

Proposed Changes

• Now Webui can work asyncronously.
• WebUi can work on the backgroud, without creating an specific task for it, and is slightly faster than before...
• To stop the WebUi, you need to go to Files>WebUi>Stop Webui
• Webui can handle multiple files uploads and send files directly to bruce.
• Drag and Drop area is now all the file list area.
• File upload, folder Upload, and Creat Folder now directly open a pop-up to choose the files/folders or type the new folder name
• Encrypt upload is a selection button that changes color when pressed
• Megalodon game now works better in T-Embed and touchscreen devices.
• Theme_buil.html now keeps the original name of the images, so you can have many images and themes saved at the same folder
• Added "debounce" to T-Embed to avoid clicking after subtle encoder detection (change position), what makes you enter in wrong places sometimes.

Types of Changes

Changed webserver lib to EspAsynWebServer

Verification

Testing

Need to fully test EvilPortal, and WebUI.
Possibly, opening an EvilPortal with WebUI in the background can lead to problems..fixed

Linked Issues

Fixes:
#987
#976
#953

[pimentelleo]

Start testing

[pimentelleo]

Seems ok