fixed size of the share icon hitbox in list view

src/main/res/layout/list_item.xml

@@ -148,9 +148,8 @@
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:layout_centerVertical="true"
-                android:layout_marginTop="@dimen/standard_quarter_margin"
-                android:layout_marginBottom="@dimen/standard_quarter_margin"
                 android:layout_marginRight="@dimen/list_item_share_right_margin"
+                android:padding="@dimen/standard_quarter_padding"
                 android:clickable="true"
                 android:focusable="true"
                 android:src="@drawable/ic_unshared" />

src/main/res/values/dims.xml

@@ -47,7 +47,7 @@
     <dimen name="two_line_secondary_text_size">14sp</dimen>
     <dimen name="list_item_avatar_icon_margin">20dp</dimen>
     <dimen name="list_item_avatar_text_margin">20dp</dimen>
-    <dimen name="list_item_share_right_margin">14dp</dimen>
+    <dimen name="list_item_share_right_margin">10dp</dimen>
     <dimen name="account_action_layout_height">72dp</dimen>
     <dimen name="zero">0dp</dimen>
     <dimen name="account_item_layout_height">72dp</dimen>