improve presentation of security problems

OpenKeychain/src/main/res/layout/remote_security_issue_dialog.xml

@@ -82,6 +82,15 @@
         tools:layout_marginBottom="50dp"
         style="?buttonBarStyle">
 
+        <Button
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="View Key"
+            android:id="@+id/button_view_key"
+            android:visibility="gone"
+            tools:visibility="visible"
+            style="?buttonBarButtonStyle" />
+
         <Button
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"