Bug Fixe

10/3/2021 - 2 bug repair -Bug 1 spotted from 3p0ch when units died while selected they wouldn't be cleaned from the listing of selected unit and would make the movement impossible afterward due to the list trying to access the missing game object, the units now remove themselves from the list clearing that bug. -Bug 2 cant click on unit to select, bug happened after introducing the fog of war, a ray cast would hit the fog instead of the unit making it impossible to hit the unit. Applied a layer mask to ignore the fog and focus only on units for the ray fixing the bug.