Clicking on zoom slider passes event through to underlying map

[chrisclaydon]

1. Open any Fusion layout

2. Pick 'Zoom-In' (+) on the Zoom Control/Slider?.

3. Move the cursor away from the control.

RESULT: Depending on the currently active widget, either:

1. the map moves with the cursor or
2. a drag-window rubber-banding line follows the cursor.

[madair]

(In [1642]) closes #152: remove event.stop() so that the full click event gets processed (mousedown/mouseup)

[chrisclaydon]

I no longer get the rubber-banding or panning, but if I'm in Select mode, the object underneath the zoom slider still gets selected.

I'm testing using the Slate template.

[madair]

(In [1649]) re #152: deactivate controls and handlers when the mouse is over the Navigator widget; widgets using the canvasTool will still click through to the map however until the canvas tool is converted to use OL handlers or replaced with OL vector drawing capabilities

[madair]

(In [1650]) re #152: switch Navigator to use mousedown event to prevent conflicts with canvasTool widgets