Checkbutton: remove unused (#8108)

* Inputtext checkbutton: add "parent"

frontend/ui/widget/checkbutton.lua

@@ -26,7 +26,6 @@ local TextBoxWidget = require("ui/widget/textboxwidget")
 local UIManager = require("ui/uimanager")
 local VerticalGroup = require("ui/widget/verticalgroup")
 local VerticalSpan = require("ui/widget/verticalspan")
-local Screen = Device.screen
 
 local CheckButton = InputContainer:new{
     callback = nil,
@@ -35,15 +34,8 @@ local CheckButton = InputContainer:new{
     enabled = true,
     face = Font:getFace("smallinfofont"),
     background = Blitbuffer.COLOR_WHITE,
-    overlap_align = "right",
     text = nil,
-    toggle_text = nil,
     max_width = nil, -- must be set by the caller
-    window = nil,
-
-    padding = Screen:scaleBySize(5),
-    margin = Screen:scaleBySize(5),
-    bordersize = Screen:scaleBySize(3),
 }
 
 function CheckButton:init()

frontend/ui/widget/inputtext.lua

@@ -391,6 +391,7 @@ function InputText:initTextBox(text, char_added)
     if self.is_password_type and self.show_password_toggle then
         self._check_button = self._check_button or CheckButton:new{
             text = _("Show password"),
+            parent = self,
             max_width = self.width,
             callback = function()
                 if self.text_type == "text" then
@@ -402,10 +403,6 @@ function InputText:initTextBox(text, char_added)
                 end
                 self:setText(self:getText(), true)
             end,
-
-            padding = self.padding,
-            margin = self.margin,
-            bordersize = self.bordersize,
         }
         self._password_toggle = FrameContainer:new{
             bordersize = 0,