UI Fixes

+ Adjusted dark theme colors
+ Moved setting to an activity
+ Code format
+ Changed some icons
+ Minor fixes

app/src/main/java/com/topjohnwu/magisk/receivers/DownloadReceiver.java

@@ -12,8 +12,8 @@ import com.topjohnwu.magisk.R;
 
 public abstract class DownloadReceiver extends BroadcastReceiver {
     public Context mContext;
-    long downloadID;
     public String mName;
+    long downloadID;
 
     public DownloadReceiver() {}