Add qcolsend() to built-in function signatures.
Fixed parsing problem with string literals and escape sequences.
The lexer should only show function words highlighted in purple if they are followed by ‘(‘.
After selecting a function in the function list, clear the filter (but ensure that function is still selected and visible)
When resuming auto-completion of a table.field, display a list of fields rather than solo auto-completion items.
Add a setting to disable auto-completion.