argtextobj by default only handles arguments inside parenthesis. This is
very limiting when editing C++ source files. This change allows the list
of bracket pairs to be configurable via a global IdeaVim variable. The
variable takes effect immediately.
With `ignorecase` enabled, select next (`<A-n>`) would get stuck on the
second occurrence even though there are more occurrences to select. This
was happening because part of logic was still doing case sensitive
comparison against the current pattern. The fix is to use case
insensitive comparator everywhere the pattern is used, if `ignorecase`
option is set.
igrekster