Improve preferences

prefs/Resources/Root.plist

 			<key>cell</key>
 			<string>PSGroupCell</string>
 			<key>footerText</key>
-			<string>To enable/disable, restart the app.</string>
+			<string>Fully enable/disable the tweak.</string>
 			<key>label</key>
 			<string>Enabled</string>
 		</dict>
+		<dict>
+			<key>PostNotification</key>
+			<string>com.lint.undelete.prefs.changed</string>
+			<key>cell</key>
+			<string>PSSwitchCell</string>
+			<key>default</key>
+			<true/>
+			<key>defaults</key>
+			<string>com.lint.undelete.prefs</string>
+			<key>key</key>
+			<string>isEnabled</string>
+			<key>label</key>
+			<string>Enabled</string>
+		</dict>
+		<dict>
+			<key>cell</key>
+			<string>PSGroupCell</string>
+			<key>label</key>
+			<string>Enabled Applications</string>
+			<key>footerText</key>
+			<string>To enable/disable, restart the app.</string>
+		</dict>
 		<dict>
 			<key>PostNotification</key>
 			<string>com.lint.undelete.prefs.changed</string>
 			<string>isAlienBlueEnabled</string>
 			<key>label</key>
 			<string>Enable Alien Blue</string>
+			<key>hasIcon</key>
+			<true/>
+			<key>icon</key>
+			<string>app_icons/AlienBlue.png</string>
 		</dict>
 		<dict>
 			<key>PostNotification</key>
 			<string>isAntennaEnabled</string>
 			<key>label</key>
 			<string>Enable Antenna</string>
+			<key>hasIcon</key>
+			<true/>
+			<key>icon</key>
+			<string>app_icons/Antenna.png</string>
 		</dict>
 		<dict>
 			<key>PostNotification</key>
 			<string>isApolloEnabled</string>
 			<key>label</key>
 			<string>Enable Apollo</string>
+			<key>hasIcon</key>
+			<true/>
+			<key>icon</key>
+			<string>app_icons/Apollo.png</string>
 		</dict>
 		<dict>
 			<key>PostNotification</key>
 			<string>isBaconReaderEnabled</string>
 			<key>label</key>
 			<string>Enable BaconReader</string>
+			<key>hasIcon</key>
+			<true/>
+			<key>icon</key>
+			<string>app_icons/BaconReader.png</string>
 		</dict>
 		<dict>
 			<key>PostNotification</key>
 			<string>isBeamEnabled</string>
 			<key>label</key>
 			<string>Enable Beam</string>
+			<key>hasIcon</key>
+			<true/>
+			<key>icon</key>
+			<string>app_icons/Beam.png</string>
 		</dict>
 		<dict>
 			<key>PostNotification</key>
 			<string>isNarwhalEnabled</string>
 			<key>label</key>
 			<string>Enable Narwhal</string>
+			<key>hasIcon</key>
+			<true/>
+			<key>icon</key>
+			<string>app_icons/Narwhal.png</string>
 		</dict>
 		<dict>
 			<key>PostNotification</key>
 			<string>isRedditEnabled</string>
 			<key>label</key>
 			<string>Enable Reddit</string>
+			<key>hasIcon</key>
+			<true/>
+			<key>icon</key>
+			<string>app_icons/Reddit.png</string>
 		</dict>
 		<dict>
 			<key>PostNotification</key>
 			<string>isSlideEnabled</string>
 			<key>label</key>
 			<string>Enable Slide</string>
+			<key>hasIcon</key>
+			<true/>
+			<key>icon</key>
+			<string>app_icons/Slide.png</string>
 		</dict>
 		<dict>
 			<key>cell</key>

prefs/TFDTSRootListController.m

 #include "TFDTSRootListController.h"
+#import <Preferences/PSSpecifier.h>
 
 @implementation TFDTSRootListController
 
 	return _specifiers;
 }
 
+- (id)readPreferenceValue:(PSSpecifier*)specifier {
+	NSString *path = [NSString stringWithFormat:@"/User/Library/Preferences/%@.plist", specifier.properties[@"defaults"]];
+	NSMutableDictionary *settings = [NSMutableDictionary dictionary];
+	[settings addEntriesFromDictionary:[NSDictionary dictionaryWithContentsOfFile:path]];
+	return (settings[specifier.properties[@"key"]]) ?: specifier.properties[@"default"];
+}
+
+- (void)setPreferenceValue:(id)value specifier:(PSSpecifier*)specifier {
+	NSString *path = [NSString stringWithFormat:@"/User/Library/Preferences/%@.plist", specifier.properties[@"defaults"]];
+	NSMutableDictionary *settings = [NSMutableDictionary dictionary];
+	[settings addEntriesFromDictionary:[NSDictionary dictionaryWithContentsOfFile:path]];
+	[settings setObject:value forKey:specifier.properties[@"key"]];
+	[settings writeToFile:path atomically:YES];
+	CFStringRef notificationName = (__bridge CFStringRef)specifier.properties[@"PostNotification"];
+
+	if (notificationName) {
+		CFNotificationCenterPostNotification(CFNotificationCenterGetDarwinNotifyCenter(), notificationName, NULL, NULL, YES);
+	}
+}
+
 @end