This would be a similar feature to ignoring case when searching.
Very often, I find myself needing to search for a specific string instance as the string with the enclosing quotes, and want to ignore variables that may be named the same thing. Often, I don't know if single or double quotes where used.
For example, I would like to be able to search for
(quotes included) but not
have foo listed in results.
Currently, I have to do two searches, one of each style of quotes, or do a regex search. It would be nice to have a checkbox "Ignore quotation style", similar to the "Case sensitive" one.