Small layout improvement

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

@@ -13,12 +13,13 @@
 
         <eu.faircode.email.FixedTextView
             android:id="@+id/tvCaption"
-            android:layout_width="wrap_content"
+            android:layout_width="0dp"
             android:layout_height="wrap_content"
-            android:drawableStart="@drawable/twotone_palette_24"
+            android:drawableEnd="@drawable/twotone_palette_24"
             android:drawablePadding="6dp"
             android:text="@string/title_setup_theme"
             android:textAppearance="@style/TextAppearance.AppCompat.Large"
+            app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toTopOf="parent" />