Refactor node type with enum and link type name
Change node shapes to typical notations
Adjust node colors
Update navigator to display the boundary of graph.
Rename file XDI_graph_global.js to XDI_graph_editor_global.js
Refactored methods. Bug fixed in navigator
Set different cursor for differnt operation. Refactor mode functions
Add: zoom to fit all the nodes or selected nodes
Improve navigator to avoid clipping
Add dialog for compile error. Dialog style adjusted
Bug fixed in error dialog.
Updating Graph input dialog

Updating the dialog text & some cosmetic changes.
Add: Expand only direct descendants, option to start with folded root, unfold all nodes
Resolve merge conflict
Refine import dialog format
Refine link label positioning
Add copy label: pompt user with selected object's labels to copy
Add Drag Select for links
Organize buttons into menus. Refine link label position.
Refactor menu CSS