Patch for handling multiple patterns in search/filter window

[ajs]

Patch for handling multiple patterns in search/filter window.

This patch allows to specify multiple patterns in the search window. It also works for the filter window and it will work for the "wildcard select" window as well when the last will be fixed.
The character ':' is used as separator.

Example:
"*.h: *.cpp" will search for files which match either *.h or *.cpp

Patch against commit 170

[David Erceg]

Thanks, committed.