Bug 797183 - association head path with spaces displayed wrong

The Transaction Association path head was being displayed with '%20' as
the space as it was not being unescaped. Fixed by unescaping and also
noticed that the error message string were wrong also.

gnucash/gnome-utils/gnc-gnome-utils.c

@@ -483,14 +483,15 @@ void
 gnc_launch_assoc (const char *uri)
 {
     wchar_t *winuri = NULL;
+    gchar *filename = NULL;
     /* ShellExecuteW open doesn't decode http escapes if it's passed a
      * file URI so we have to do it. */
     if (gnc_uri_is_file_uri (uri))
     {
         gchar *uri_ue = g_uri_unescape_string (uri, NULL);
-        gchar *filename = gnc_uri_get_path (uri_ue);
+        filename = gnc_uri_get_path (uri_ue);
+        filename = g_strdelimit (filename, "/", '\\'); // needed for unc paths
         winuri = (wchar_t *)g_utf8_to_utf16(filename, -1, NULL, NULL, NULL);
-        g_free (filename);
         g_free (uri_ue);
     }
     else
@@ -505,10 +506,11 @@ gnc_launch_assoc (const char *uri)
         {
             const gchar *message =
             _("GnuCash could not find the associated file");
-            gnc_error_dialog(NULL, "%s: %s", message, uri);
+            gnc_error_dialog(NULL, "%s:\n%s", message, filename);
         }
         g_free (wincmd);
         g_free (winuri);
+        g_free (filename);
     }
 }
 
@@ -533,9 +535,23 @@ gnc_launch_assoc (const char *uri)
 
     g_assert(error != NULL);
     {
+        gchar *error_uri = NULL;
         const gchar *message =
             _("GnuCash could not open the associated URI:");
-        gnc_error_dialog(NULL, "%s\n%s", message, uri);
+
+        if (gnc_uri_is_file_uri (uri))
+        {
+            gchar *uri_ue = g_uri_unescape_string (uri, NULL);
+            gchar *filename = gnc_uri_get_path (uri_ue);
+            error_uri = g_strdup (filename);
+            g_free (uri_ue);
+            g_free (filename);
+        }
+        else
+            error_uri = g_strdup (uri);
+
+        gnc_error_dialog(NULL, "%s\n%s", message, error_uri);
+        g_free (error_uri);
     }
     PERR ("%s", error->message);
     g_error_free(error);

gnucash/gnome/dialog-trans-assoc.c

@@ -486,7 +486,8 @@ gnc_assoc_dialog_create (GtkWindow *parent, AssocDialog *assoc_dialog)
 
     if (assoc_dialog->path_head && g_strcmp0 (assoc_dialog->path_head, "") != 0) // not default entry
     {
-        gchar *path_head_str = gnc_uri_get_path (assoc_dialog->path_head);
+        gchar *path_head_ue_str = g_uri_unescape_string (assoc_dialog->path_head, NULL);
+        gchar *path_head_str = gnc_uri_get_path (path_head_ue_str);
         gchar *path_head_label;
 
         // test for current folder being present
@@ -499,6 +500,7 @@ gnc_assoc_dialog_create (GtkWindow *parent, AssocDialog *assoc_dialog)
         gtk_label_set_text (GTK_LABEL(path_head), path_head_label);
         g_free (path_head_label);
         g_free (path_head_str);
+        g_free (path_head_ue_str);
     }
     else
     {