HyMenu

Full Asset handling rework

• HyMenuAssets unzips automatically if it detects it still packed
• Changes on all Assets inside the extracted HyMenuAssets folder get updated immediately after change
• Changes to language files get updated immediately
• Logo changes are visible immediately
• newly added are visible and usable shortly after inserting
• removed icons won't be available shortly after deleting
• No more crashes if a player joins after you edit Assets

known issue: 

After changing assets in the HyMenuAssets Directory the UI looks broken until gets updated 
(resize Window, close/open menu, navigate to another page in menu - all work) 
but ONLY if you had it open while the Assets got updated.

-> will implement a redraw for everyone who had a menupage opened to counter this behaviour

Not tested on Linux Server, new Assetpack handling may cause Errors there.
Grateful for Feedback if this works as expected there too.