Allow multiple words in filter search box
This issue was created automatically from an original Mantis Issue. Further discussion may take place here.
The filter search box (that dialog box where you can type source/filter names after hitting ctrl-space or option-space), is very handy. However, it only lets you type a single word with no spaces. Thus, it is sometimes hard to narrow down to filters with several words that are all common (for example, the plot over line filter). It would be even greater if you were able to enter multiple words, separated by spaces, and it would match any source/filter containing all of them. For example, you should be able to type in "plot line" or "line plot" and you should get all filters that have the substrings "plot" and "line".