Space can be used instead of slash in file chooser (⌘T)

This enables full path search.

Closes #893.

Frameworks/OakFilterList/src/FileChooser.mm

@@ -96,7 +96,7 @@ - (void)highlightSelectionInClipRect:(NSRect)clipRect
 			if(str == NULL_STR || str.empty())
 				return;
 
-			if(regexp::match_t const& m = regexp::search("(?x)  \\A  (?: (?:/(?=.*/))? (.*) / )?  ([^/]*?)  (\\.[^/]+?)?  (?: :([\\d+:-x\\+]*) | @(.*) )?  \\z", str))
+			if(regexp::match_t const& m = regexp::search("(?x)  \\A  (?: (?:[/ ](?=.*[/ ]))? (.*) [/ ] )?  ([^/ ]*?)  (\\.[^/ ]+?)?  (?: :([\\d+:-x\\+]*) | @(.*) )?  \\z", str))
 			{
 				_initialized = true;