* src/widgets/modest-msg-view.c:

* src/widgets/modest-msg-view.c:
	* Added implementation of get_message_is_empty method. It uses
	  gtk_html_export method to know if the buffer has any text
	  representation and this is empty or not.
* src/maemo/modest-msg-view-window.c:
	* Removed check for empty buffer to show "nothing to find"
	  banner on toggling the toolbar. This should be shown on trying
	  to search in the toolbar, not on trying to show the toolbar.
	* Added the nothing to find banner on searching empty buffers,
	  using the new implementation. This is a partial fix to
	  NB#62350.

pmo-trunk-r2756