Suggest route: UI Events

- TODO: prompt user for the origin(text) and destination(text) before they
  can trace the route
- TODO: Save routes to the DB
- TODO: Show list of suggested routes in suggest routes page
- TODO: Show a certain route to map from the database
- TEMP: convert nodes to string to be prepared to be sent to server to be
  saved to database
- Clicking suggest route would show 3 buttons: Done, Clear and Cancel
- Clear would reset the markers, so that users can create again the route
- Cancel would return them to normal mode
- All of the buttons will trigger a function that will remove the click
  event on the map
Suggest Route: Save to database

- Update the database after pulling this commit (import
  public/others/traffix.sql)
- This commit saves the routes suggested by the user
- TODO: Set if the routes is official or not
- TODO: Create modal for suggest route