[Sandbox] Handle file tree path config better

Handle the configuration better, by adding the path to the grants list
if it is newly configured.

Signed-off-by: Christopher Snowhill <kode54@gmail.com>

FileTree/DirectoryNode.m

@@ -20,6 +20,8 @@
 }
 
 - (void)updatePath {
+	if(!url) return;
+
 	NSDirectoryEnumerator *enumerator = [[NSFileManager defaultManager] enumeratorAtURL:url
 	                                                         includingPropertiesForKeys:@[NSURLNameKey, NSURLIsDirectoryKey]
 	                                                                            options:(NSDirectoryEnumerationSkipsSubdirectoryDescendants | NSDirectoryEnumerationSkipsPackageDescendants | NSDirectoryEnumerationSkipsHiddenFiles)

FileTree/FileTreeDataSource.m

@@ -74,7 +74,7 @@ static NSURL *defaultMusicDirectory(void) {
 			DLog(@"File tree root URL: %@\n", url);
 			NSURL *newURL = [NSURL URLWithString:url];
 			if((!self.rootURL || ![self.rootURL isEqualTo:newURL]) && ![[SandboxBroker sharedSandboxBroker] areAllPathsSafe:@[newURL]]) {
-				[AppController globalShowPathSuggester];
+				[[SandboxBroker sharedSandboxBroker] addFolderIfMissing:newURL];
 			}
 			self.rootURL = newURL;
 		}

FileTree/PathWatcher.m

@@ -44,6 +44,8 @@ const FSEventStreamEventId eventIds[]) {
 - (void)setPath:(NSString *)path {
 	[self cleanUp];
 
+	if(!path) return;
+
 	// Create FSEvent stream
 	NSArray *pathsToWatch = @[path];