add full functionality to add and edit groups in group view

UI/Components/GroupMenu.gd

@@ -61,6 +61,10 @@ func set_text(text: String) -> void:
 	header_text_label.text = text
 
 
+func get_text() -> String:
+	return header_text_label.text
+
+
 func set_description(text: String) -> void:
 	if text == "":
 		description_label.visible = false
@@ -84,6 +88,8 @@ func set_children_visible(p_visible: bool) -> void:
 	add_install_button_container.visible = p_visible
 	inner_separator.visible = p_visible
 
+	description_label.visible = p_visible && !description_label.text.is_empty()
+
 
 func add_custom(control: Control) -> void:
 	header_custom_control_container.add_child(control)

UI/Components/OverrideEditorSettingsMenu/OverrideEditorSettingsMenu.gd

@@ -33,3 +33,10 @@ func clear() -> void:
 		func(c: OverrideEditorSettingsMenuItem):
 			c.queue_free()
 	)
+
+
+func fill_from_dictionary(overrides: Dictionary) -> void:
+	for override in overrides:
+		var item: OverrideEditorSettingsMenuItem = ITEM_SCENE.instantiate()
+		add_item(item)
+		item.fill(override, overrides[override])

UI/Components/OverrideEditorSettingsMenu/OverrideEditorSettingsMenuItem.gd

@@ -19,6 +19,11 @@ func _ready() -> void:
 
 func get_property() -> Dictionary:
 	var prop_name = property_name_line_edit.text
-	var value = str_to_var(prop_name)
+	var value = str_to_var(property_value_line_edit.text)
 
 	return {prop_name: value}
+
+
+func fill(key: String, value: Variant) -> void:
+	property_name_line_edit.text = key
+	property_value_line_edit.text = var_to_str(value)