Added: Editable entity combo box can now use default selected and hav… (#1871)
* Added: Editable entity combo box can now use default selected and have icons
* Changed: Move icon check up
* Fixed: Not passing booleans to `vars.selected`
* Fixed: Selection operator working with nil/bool
Moved: Flag nest to the loop
* Added: Spacing before if-statement
* Fixed: IF bracket space
* Update prop_combo.lua
Co-authored-by: Rubat <3299036+robotboy655@users.noreply.github.com>