* Refactor: use pointer down state for alt duplication flag
* Refactor: use pointer down state for drag state
* Refactor: simplify over scrollbars check
* Refactor: move pointer move handler out of pointer down handler
* Refactor: move pointer up handler out of pointer down handler
* Refactor: further simplify scrollbar check state in pointer down event
* Refactor: pull out initial pointer down state creation
* Refactor: introduce pointer down state to replace implicit closure state with an explicit object
* Refactor: use pointer down state for resize handle
* Refactor: use pointer down state for isResizing
* Refactor: use pointer down state for resizing offset
* Refactor: use pointer down state for hit element
* Refactor: move selection handling out of pointer down event handler
* Refactor: move text handling out of pointer down event handler
* Refactor: move linear tools handling out of pointer down event handler
* Refactor: move element creation out of pointer down handler
* Refactor: Move context menu touch device handling
* Refactor: Move more stuff out of pointer down
* Refactor: Move last coords into an object
* Refactor: Move scrollbar handling out of pointer down
* Refactor: simplify resizing in pointer down
* Refactor: further simplify resizing in pointer down
* Refactor: clarify clearing selection code
* Refactor: move out clearing selection from pointer down
* Refactor: further simplify deselection in pointer down