close history window on ESC. fixes #3233

data/glade/history_window.glade

@@ -7,6 +7,7 @@
     <property name="role">history</property>
     <property name="default_width">650</property>
     <property name="default_height">350</property>
+    <signal name="key_press_event" handler="on_history_window_key_press_event"/>
     <signal name="destroy" handler="on_history_window_destroy"/>
     <child>
       <widget class="GtkVBox" id="vbox">
@@ -17,7 +18,6 @@
           <widget class="GtkFrame" id="frame1">
             <property name="visible">True</property>
             <property name="events">GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK</property>
-            <property name="label_xalign">0</property>
             <property name="shadow_type">GTK_SHADOW_NONE</property>
             <child>
               <widget class="GtkAlignment" id="alignment1">
@@ -64,7 +64,6 @@ Enter the jid of a groupchat or a contact here. For online accounts you can even
           <widget class="GtkFrame" id="frame2">
             <property name="visible">True</property>
             <property name="events">GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK</property>
-            <property name="label_xalign">0</property>
             <property name="shadow_type">GTK_SHADOW_NONE</property>
             <child>
               <widget class="GtkAlignment" id="alignment2">

src/history_window.py

@@ -142,6 +142,10 @@ class HistoryWindow:
 		self.history_textview.del_handlers()
 		del gajim.interface.instances['logs']
 
+	def on_history_window_key_press_event(self, widget, event):
+		if event.keyval == gtk.keysyms.Escape:
+			self.window.destroy()
+
 	def on_close_button_clicked(self, widget):
 		self.window.destroy()