Added MultiColor, cleanup,...

app/src/main/res/layout/fragment_about.xml

@@ -1,10 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
 <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    tools:context=".activity.fragment.AboutFragment" >
+    tools:context=".activity.fragment.AboutFragment">
 
     <LinearLayout
         android:layout_width="match_parent"
@@ -17,6 +16,7 @@
             android:layout_height="250dp"
             android:layout_marginTop="40dp"
             android:layout_marginBottom="30dp"
+            android:contentDescription="@string/logo"
             android:src="@mipmap/ic_launcher_round" />
 
         <TextView