Refs #14968, #13341.  Move _onMouseDown processing to _onFocus(by=mouse) to better align with the focus manager's current behavior of invoking _onFocus before onfocus and before onmousedown.
Refs #14968, #13341.  Move _onMouseDown processing to _onFocus(by=mouse) to better align with the focus manager's current behavior of invoking _onFocus before onfocus and before onmousedown.

git-svn-id: 674a2d6b1e32e53f607eb824547723f32280967e@28290 560b804f-0ae3-0310-86f3-f6aa0a117693

redaktor/deliteful