Fixed a series of bugs (thanks everyone for spotting them)
-Added client to server for the HeldBlock packet, as intended
-Fixed bug "Opening chat menu when moving makes the movement stick (advanced hacks) bug" Thanks AndrewPH
-Fixed bug "Options Menu bug" Thanks 123DMWM
-Fixed bug "scroll through block hotbar when block menu is open" Thanks AndrewPH
-Fixed bug "When Joining New Worlds, Block Hotbar gets Reset To Default Blocks bug" Thanks DingusBungus
-Fixed "Forever Falling" thanks 123DMWM

Signed-off-by: Jonty800 <Jonty800@gmail.com>