richedit: Respect manually added links when autourldetect is disabled.
EM_SETCHARFORMAT can be used to make text links. Automatic URL
detection being enable would cause these links to be removed if the text
is not a URL, so this must be prevented.
Previously checks were made for AutoURLDetect_bEnable before calling
ME_UpdateSelectionLinkAttribute, or ME_UpdateLinkAttribute. This is
more error prone than checking for this within the function, so one call
was missing this check.
ME_SetCursor also didn't respect this behaviour, since it wouldn't set
the cursor to the hand when hovering over a link without automatic URL
detection disabled.