fix: remove initial ugs popup [MTT-3563] (#650)

* renaming start buttons

* removing initial ugs popup

* Adding tooltip for UGS setup

* Made TooltipDelay into a serialized field instead of a constant

* set tooltip delay for UGS setup info to 0 and increased text size

* Extracted main menu UI canvas into prefab

Co-authored-by: Sam Bellomo <[email protected]>

Author: LPLafontaineB