Additional fix for issue 5886

Even inside member function, implicit TemplateThisParameter should be applied.
fix Issue 7572 - f.fn!(void) is not an lvalue
fix Issue 9961 - Using UFCS properties suppress actual errors
fix Issue 8245 - UFCS doesn't work for pointers
fix Issue 9241 - 2.061: Property call error message disappeared
fix Issue 9540 - Compiler crash on delegate context frame assignment
Merge pull request #1911 from 9rnsr/fix_ufcs_err

Issue 9961 - Using UFCS properties suppress actual errors