[geary/wip/728002-webkit2: 87/96] Update composer hover url and link overlay correctly on mouseover/out.

[Michael Gratton <mjog src gnome org>]

commit eef7dee243d2e6d0292d6e67a74464e2cf98a56c
Author: Michael James Gratton <mike vee net>
Date:   Fri Jan 6 09:47:43 2017 +1100

    Update composer hover url and link overlay correctly on mouseover/out.

 src/client/composer/composer-widget.vala |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/src/client/composer/composer-widget.vala b/src/client/composer/composer-widget.vala
index 45e488b..45684b9 100644
--- a/src/client/composer/composer-widget.vala
+++ b/src/client/composer/composer-widget.vala
@@ -1842,6 +1842,10 @@ public class ComposerWidget : Gtk.EventBox {
         if (hit_test.context_is_link()) {
             copy_link_enabled = true;
             this.hover_url = hit_test.get_link_uri();
+            this.message_overlay_label.label = this.hover_url;
+        } else {
+            this.hover_url = null;
+            this.message_overlay_label.label = "";
         }
         get_action(ACTION_COPY_LINK).set_enabled(copy_link_enabled);
     }