Consistent filter icon

app/src/main/res/drawable/twotone_rule_24.xml

@@ -1,10 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-    android:width="24dp"
-    android:height="24dp"
-    android:viewportWidth="24"
-    android:viewportHeight="24"
-    android:tint="?attr/colorControlNormal">
-  <path
-      android:fillColor="@android:color/white"
-      android:pathData="M16.54,11L13,7.46l1.41,-1.41l2.12,2.12l4.24,-4.24l1.41,1.41L16.54,11zM11,7H2v2h9V7zM21,13.41L19.59,12L17,14.59L14.41,12L13,13.41L15.59,16L13,18.59L14.41,20L17,17.41L19.59,20L21,18.59L18.41,16L21,13.41zM11,15H2v2h9V15z"/>
-</vector>

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

@@ -551,7 +551,7 @@
             android:padding="12dp"
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toBottomOf="@id/ivDownload"
-            app:srcCompat="@drawable/twotone_rule_24" />
+            app:srcCompat="@drawable/twotone_filter_alt_24" />
 
         <eu.faircode.email.FixedTextView
             android:id="@+id/tvRule"

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

@@ -223,7 +223,7 @@
         android:padding="6dp"
         android:scaleType="fitCenter"
         android:tooltipText="@string/title_legend_create_rule"
-        app:srcCompat="@drawable/twotone_rule_24"
+        app:srcCompat="@drawable/twotone_filter_alt_24"
         tools:ignore="MissingConstraints" />
 
     <ImageButton