[gtkmm] Minor fixes after Gtk::EventControllerLegacy was added

[Kjell Ahlstedt <kjellahl src gnome org>]

commit fd5349df89fd45ca916f51e53218fe8bc2893e52
Author: Kjell Ahlstedt <kjellahlstedt gmail com>
Date:   Mon Jun 21 18:52:48 2021 +0200

    Minor fixes after Gtk::EventControllerLegacy was added

 .gitignore                       | 2 ++
 gtk/src/eventcontrollerlegacy.hg | 4 +---
 gtk/src/filelist.am              | 1 +
 3 files changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/.gitignore b/.gitignore
index a27e937c..a98d1e98 100644
--- a/.gitignore
+++ b/.gitignore
@@ -293,6 +293,8 @@ gtk/gtkmm/eventcontrollerfocus.cc
 gtk/gtkmm/eventcontrollerfocus.h
 gtk/gtkmm/eventcontrollerkey.cc
 gtk/gtkmm/eventcontrollerkey.h
+gtk/gtkmm/eventcontrollerlegacy.cc
+gtk/gtkmm/eventcontrollerlegacy.h
 gtk/gtkmm/eventcontrollermotion.cc
 gtk/gtkmm/eventcontrollermotion.h
 gtk/gtkmm/eventcontrollerscroll.cc
diff --git a/gtk/src/eventcontrollerlegacy.hg b/gtk/src/eventcontrollerlegacy.hg
index e5526518..9ab4162d 100644
--- a/gtk/src/eventcontrollerlegacy.hg
+++ b/gtk/src/eventcontrollerlegacy.hg
@@ -21,8 +21,6 @@ _PINCLUDE(gtkmm/private/eventcontroller_p.h)
 
 namespace Gtk
 {
-class GTKMM_API Widget;
-
 /** Event controller that provides raw access to the event stream.
  *
  * %Gtk::EventControllerLegacy is an event controller that provides raw
@@ -31,7 +29,7 @@ class GTKMM_API Widget;
  * It should only be used as a last resort if none of the other event
  * controllers or gestures do the job.
  *
- * @newin{4,3}
+ * @newin{4,4}
  *
  * @ingroup Gestures
  */
diff --git a/gtk/src/filelist.am b/gtk/src/filelist.am
index 00d3edd3..0c60e49a 100644
--- a/gtk/src/filelist.am
+++ b/gtk/src/filelist.am
@@ -88,6 +88,7 @@ gtkmm_files_any_hg =          \
        eventcontroller.hg              \
        eventcontrollerfocus.hg \
        eventcontrollerkey.hg           \
+       eventcontrollerlegacy.hg                \
        eventcontrollermotion.hg                \
        eventcontrollerscroll.hg                \
        expander.hg             \