Updated LineEditWithButtons

Added missing toggle for left button and right button. Fixed right
button icon setter.
Added dups of the stylebox for the line edit, as well as storing
original left and right content margins.
Updated resize to add to the content margins for left and right,
depending on if we are creating a left button, or right button.
Ensure that Button is a true flat button, with StyleBoxEmpty.
Added to spacer and container the mouse filter ignore, so that the text
field doesn't get covered by invisible controls.

lib/UI/line_edit_with_buttons.gd

@@ -7,6 +7,8 @@ signal left_button_toggled()
 signal right_button_pressed()
 signal right_button_toggled()
 
+static var _empty_sb = StyleBoxEmpty.new()
+
 @export_subgroup("Left Icon")
 @export var left: Texture2D:
 	set(value):
@@ -18,6 +20,7 @@ signal right_button_toggled()
 			return
 		if not _left_btn and value:
 			_left_btn = _create_button_icon(value)
+			_left_btn.toggle_mode = left_is_toggle
 			_left_btn.pressed.connect(left_button_pressed.emit)
 			_left_btn.toggled.connect(left_button_toggled.emit)
 			return
@@ -33,46 +36,91 @@ signal right_button_toggled()
 			return
 		if not _right_btn and value:
 			_right_btn = _create_button_icon(value)
+			_right_btn.toggle_mode = right_is_toggle
 			_right_btn.pressed.connect(right_button_pressed.emit)
 			_right_btn.toggled.connect(right_button_toggled.emit)
 			return
-		_left_btn.icon = value
+		_right_btn.icon = value
 @export var right_is_toggle: bool = false
 
 var _left_btn: Button
 var _right_btn: Button
 var _container: HBoxContainer
 var _spacer: Control
+var _nsb: StyleBox
+var _rosb: StyleBox
+var _fsb: StyleBox
+
+var _nsb_orig_left: float
+var _nsb_orig_right: float
+var _rosb_orig_left: float
+var _rosb_orig_right: float
+var _fsb_orig_left: float
+var _fsb_orig_right: float
 
 # Called when the node enters the scene tree for the first time.
 func _ready() -> void:
 	_container = HBoxContainer.new()
 	_spacer = Control.new()
+	_spacer.mouse_filter = Control.MOUSE_FILTER_IGNORE
 	_spacer.size_flags_horizontal = Control.SIZE_EXPAND_FILL
+	_container.mouse_filter = Control.MOUSE_FILTER_IGNORE
 	_container.add_child(_spacer)
 	add_child(_container)
 	if left != null:
 		_left_btn = _create_button_icon(left)
+		_left_btn.toggle_mode = left_is_toggle
 		_left_btn.pressed.connect(left_button_pressed.emit)
 		_left_btn.toggled.connect(left_button_toggled.emit)
 	if right != null:
 		_right_btn = _create_button_icon(right, -1)
+		_right_btn.toggle_mode = right_is_toggle
 		_right_btn.pressed.connect(right_button_pressed.emit)
 		_right_btn.toggled.connect(right_button_toggled.emit)
 	
+	_nsb = get_theme_stylebox(&"normal").duplicate(true)
+	_rosb = get_theme_stylebox(&"read_only").duplicate(true)
+	_fsb = get_theme_stylebox(&"focus").duplicate(true)
+	_nsb_orig_left = _nsb.content_margin_left
+	_nsb_orig_right = _nsb.content_margin_right
+	_rosb_orig_left = _rosb.content_margin_left
+	_rosb_orig_right = _rosb.content_margin_right
+	_fsb_orig_left = _fsb.content_margin_left
+	_fsb_orig_right = _fsb.content_margin_right
+	
+	add_theme_stylebox_override(&"normal", _nsb)
+	add_theme_stylebox_override(&"read_only", _rosb)
+	add_theme_stylebox_override(&"focus", _fsb)
+	
 	item_rect_changed.connect(_handle_resize)
 
-func _create_button_icon(icon: Texture2D, pos: int = 0) -> Button:
+func _create_button_icon(icon_texture: Texture2D, pos: int = 0) -> Button:
 	var btn = Button.new()
-	btn.icon = left
+	btn.icon = icon_texture
 	btn.flat = true
 	btn.icon_alignment = HORIZONTAL_ALIGNMENT_CENTER
 	btn.vertical_icon_alignment = VERTICAL_ALIGNMENT_CENTER
 	btn.expand_icon = true
-	btn.toggle_mode = left_is_toggle
+	btn.custom_minimum_size = Vector2(0, size.y)
+	btn.ready.connect(func(): btn.icon = icon_texture)
+	btn.add_theme_stylebox_override(&"normal", _empty_sb)
+	btn.add_theme_stylebox_override(&"pressed", _empty_sb)
+	btn.add_theme_stylebox_override(&"hover", _empty_sb)
+	btn.add_theme_stylebox_override(&"disabled", _empty_sb)
+	btn.add_theme_stylebox_override(&"focus", _empty_sb)
 	_container.add_child(btn)
 	_container.move_child(btn, pos)
 	return btn
 
 func _handle_resize() -> void:
 	_container.size = size
+	if _left_btn:
+		_left_btn.custom_minimum_size = Vector2(size.y, size.y)
+		_fsb.content_margin_left = _fsb_orig_left + size.y
+		_rosb.content_margin_left = _rosb_orig_left + size.y
+		_nsb.content_margin_left = _nsb_orig_left + size.y
+	if _right_btn:
+		_right_btn.custom_minimum_size = Vector2(size.y, size.y)
+		_fsb.content_margin_right = _fsb_orig_right + size.y
+		_rosb.content_margin_right = _rosb_orig_right + size.y
+		_nsb.content_margin_right = _nsb_orig_right + size.y