Refs #2466: NetworkViewManager now ignores some Cytoscape events when a session is still being loaded, which can decrease the time it takes to load a session.

(cherry picked from commit 1680f6e93b8860c948110888b7896282af0089de)
Refs #2466: Implements View.clearVisualProperties method so DGraphView no longer has to set null to the visual properties of all nodes/edges when a VisualStyle is applied—this new method should be faster.

(cherry picked from commit f3055f9665d3290f063cf37fd0dcd411426c6a37)
Refs #2476: VisualStyle.apply(CyRow,View) should work as expected now.

(cherry picked from commit 9d0f69bed5c937bf92cfd5fbd15efefacdacb113)
Refs #1969: User’s default list of visual properties (visible property sheet items) are now reset when a new session is created or loaded.

(cherry picked from commit b70af7be15d9583b8fc84430c409799f7f508d8b)