BRANCH SP-772:
   removed the drag_ghost_copy div from the PageNavContainerWdg and made it available during setup
   added spt.table.get_selected_codes()
   improved the interaction of drag and drop with dashed borders displaying at the drop site
   fixed a NamingUtil.eval_template() undefined variable error
BRANCH SP-722:
  made tile layout draggable in a shot planner scenario and added a few attributes to it which already exists in TableLayoutWdg like spt_search_key_v2 and spt_display_value
  made the tile non-highlightable
Merge branch 'remkonoteboom/4.3' of https://github.com/southpawtech/TACTIC-DEV into remkonoteboom/4.3
BRANCH 4.3: added sys import
Merge branch 'master' into 4.3
Merge branch 'remkonoteboom/4.3' of https://github.com/southpawtech/TACTIC-DEV into remkonoteboom/4.3
BRANCH 4.3: fixed tile layout to handle snapshots
Merge branch 'remkonoteboom/4.3' of https://github.com/southpawtech/TACTIC-DEV into remkonoteboom/4.3
eerge branch 'remkonoteboom/4.3' of https://github.com/southpawtech/TACTIC-DEV into remkonoteboom/4.3
BRANCH 4.3: adjusted section widget sizes
Merge branch 'remkonoteboom/4.3' of https://github.com/southpawtech/TACTIC-DEV into remkonoteboom/4.3
Merge pull request #12 from southpawtech/4.2

4.2
Merge pull request #13 from southpawtech/4.3

4.3
Merge branch 'remkonoteboom/4.3' of https://github.com/southpawtech/TACTIC-DEV into remkonoteboom/4.3
Merge branch 'remkonoteboom/4.3' of https://github.com/southpawtech/TACTIC-DEV into remkonoteboom/4.3
Merge branch 'remkonoteboom/4.3' of https://github.com/southpawtech/TACTIC-DEV into remkonoteboom/4.3
Merge branch 'remkonoteboom/4.3' of https://github.com/southpawtech/TACTIC-DEV into remkonoteboom/4.3
BRANCH 4.3: various updates to support multi-sites, especially
customizing the asset dir and the web dir
BRANCH 4.3: more alignment fixes for bootstrap
BRANCH 4.3: lots of fixes to handle multi-site