better sizing on btn title

src/App/Pages/Vault/CiphersPage.xaml

@@ -29,7 +29,7 @@
             Spacing="0"
             Padding="0">
             <controls:MiButton
-                StyleClass="btn-title"
+                StyleClass="btn-title, btn-title-platform"
                 Text="&#xe5c4;"
                 VerticalOptions="CenterAndExpand"
                 Clicked="BackButton_Clicked" />

src/App/Styles/Android.xaml

@@ -19,6 +19,17 @@
                 Value="25" />
     </Style>
     
+    <!-- Title -->
+
+    <Style TargetType="Button"
+           Class="btn-title-platform"
+           ApplyToDerivedTypes="True">
+        <Setter Property="WidthRequest"
+                Value="28" />
+        <Setter Property="FontSize"
+                Value="24" />
+    </Style>
+
     <!-- List -->
     
     <Style TargetType="ListView"

src/App/Styles/Base.xaml

@@ -77,10 +77,6 @@
                 Value="Transparent" />
         <Setter Property="Padding"
                 Value="0" />
-        <Setter Property="WidthRequest"
-                Value="37" />
-        <Setter Property="FontSize"
-                Value="25" />
         <Setter Property="TextColor"
                 Value="{StaticResource TitleTextColor}" />
     </Style>