Fixes to make Chrome on par with Firefox + other fixes + support cut/copy-and-paste of nodes in subgraphs

New features

• Cut/Copy-and-paste of nodes in subgraphs are now supported.

Fixed bugs

• Keyboard input is targeted to the text editor even after certain mouse operations in the graph
• Cut/Copy-and-paste of a node only indirectly declared with and edge specification in the DOT source throws error
• Drag area select does not select anything if the mouse button is released outside the canvas
• In Chrome, middle-mouse node insertion does not work
• In Chrome, de-selecting selected nodes and edges by clicking the canvas does not work
• In Chrome, drawing an edge throws an error, but works otherwise
• In Chrome, inserting a node with shape note, tab, box3d or others throws an error, but works otherwise
• In Chrome, drag-and-drop insert node doesn't work

Currently Known Limitations

Apart from the numerous cool features that are missing, here's a list of known limitations in the features that do exist:

Since previous release:

None.

In previous release:

• The visual editing capabilities requires the DOT source to be organized with only one node or edge per line, since they currently operate by inserting or deleting complete lines.