[epiphany/mcatanzaro/#985] Remove unused ephy-middle-clickable-button

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 7d238b793815d18bec2d59e603040ce53ee5de2e
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Tue Nov 5 16:33:57 2019 -0600

    Remove unused ephy-middle-clickable-button
    
    Fixes #985

 lib/widgets/ephy-middle-clickable-button.c | 72 ------------------------------
 lib/widgets/ephy-middle-clickable-button.h | 34 --------------
 lib/widgets/meson.build                    |  1 -
 src/ephy-action-bar-start.c                |  2 +-
 4 files changed, 1 insertion(+), 108 deletions(-)
---
diff --git a/lib/widgets/meson.build b/lib/widgets/meson.build
index cea7788a7..217b871fc 100644
--- a/lib/widgets/meson.build
+++ b/lib/widgets/meson.build
@@ -14,7 +14,6 @@ libephywidgets_sources = [
   'ephy-download-widget.c',
   'ephy-file-chooser.c',
   'ephy-location-entry.c',
-  'ephy-middle-clickable-button.c',
   'ephy-security-popover.c',
   'ephy-title-box.c',
   'ephy-title-widget.c',
diff --git a/src/ephy-action-bar-start.c b/src/ephy-action-bar-start.c
index 368b2a8cf..1ba6af90e 100644
--- a/src/ephy-action-bar-start.c
+++ b/src/ephy-action-bar-start.c
@@ -333,7 +333,7 @@ navigation_button_press_event_cb (GtkButton *button,
     g_source_set_name_by_id (action_bar_start->navigation_buttons_menu_timeout, "[epiphany] 
menu_timeout_cb");
   }
 
-  return FALSE;
+  return GDK_EVENT_STOP;
 }
 
 static gboolean