Dialog styling improvements
Add back sensor dialog w/ google chart
More frontend work
Add local copy of dryicons icons
Create generic dialog node
Change CanoDevicesDialogNode to use CanoDialogNode
Refactoring of dialog boxes and main page nodes
Add CanoOptionNode item selection widget
Use OptionNode for devices list
List sensors in monitor dialog
Implement sensor selection and data fetching
Draw google chart using fetched data
Fix filename typo cano_plout.js->cano_plot.js