Fix gallery search for folders with underscore

Gallery title names replace '_' in the folder name with ' ' (generate_main_html()). To match against these title names when searching, we must also replace '_' with ' ' for each folder name we add to the list of titles to unhide.

nhentai/viewer/main.js

@@ -139,7 +139,7 @@ function filter_searcher(){
 					break
 			}
 		}
-		if (verifier){doujinshi_id.push(data[i].Folder);}
+		if (verifier){doujinshi_id.push(data[i].Folder.replace("_", " "));}
 	}
 	var gallery = document.getElementsByClassName("gallery-favorite");
 	for (var i = 0; i < gallery.length; i++){
@@ -174,4 +174,4 @@ function tag_maker(data){
 			document.getElementById("tags").appendChild(node);
 		}
 	}
-}
+}