Fix sizeToContents not working properly when childrens are not docked

src/main/kotlin/ru/dbotthepony/mc/otm/client/screen/panels/EditablePanel.kt

@@ -1404,7 +1404,14 @@ open class EditablePanel<out S : Screen>(
 
 		for (child in visibleChildrenInternal) {
 			when (child.dock) {
-				Dock.NONE, Dock.FILL -> {} // do nothing
+				Dock.NONE -> {
+					width = maxOf(width, child.x + child.width)
+					height = maxOf(height, child.y + child.height)
+				}
+
+				Dock.FILL -> {
+					throw RuntimeException()
+				} // do nothing
 
 				Dock.LEFT, Dock.RIGHT -> {
 					if (previousDock != 1) {