Improve color decorators recognition

[ProspectPyxis]

There are three cases I found where color decorators incorrectly do not show up:

• Any color after a ?= or := conditional assignment operator
• Color functions without commas
• In function calls

[iChenLei]

@ProspectPyxis Thanks for report this issue, I will investigate it later.

[ProspectPyxis]

Adding to this, I found another location where color decorators don't show up correctly: in function calls. I will edit this onto the main issue post as well.