Move Drawer handle in own file
This is a first step of actually moving the handle inside the top toolbar
they will be accessible from
ApplicationWindow {
pageStack.globalToolBar.leadingButton
pageStack.globalToolBar.trailingButton
}
and replaceable with custom buttons/controls if the application has there things other than the drawers
some of the handle-related api is already gone, except the handle itself (which can stay always accessible from here) tooltips can now be set by setting QQC2.ToolTip.text on the handle item and handleVisible by setting visible or enabled on it related task: #64 (closed)