make HotkeyLabels react to clicking

also be better about initializing EditField frame height

library/lua/gui/widgets.lua

@@ -187,10 +187,14 @@ EditField.ATTRS{
     on_submit2 = DEFAULT_NIL,
     key = DEFAULT_NIL,
     key_sep = DEFAULT_NIL,
-    frame = {h=1},
     modal = false,
 }
 
+function EditField:preinit(init_table)
+    local frame = init_table.frame or {}
+    frame.h = frame.h or 1
+end
+
 function EditField:init()
     local function on_activate()
         self.saved_text = self.text
@@ -744,6 +748,16 @@ function HotkeyLabel:init()
                   on_activate=self.on_activate}}
 end
 
+function HotkeyLabel:onInput(keys)
+    if HotkeyLabel.super.onInput(self, keys) then
+        return true
+    elseif keys._MOUSE_L and self:getMousePos() then
+        self.on_activate()
+        return true
+    end
+
+end
+
 ----------------------
 -- CycleHotkeyLabel --
 ----------------------