Improve list management, make it more accesible

[bar-alex]

• at the moment it only allows to create and check as completed, it should allow to edit and delete
• experiment with wiping gestures or long-press (for mobile/tablet) and get a context menu (could work on computers), right-click for the same menu on computers
• experiment with "contenteditable" attribute to edit the already created item
• experiment with clicking on a symbol on the same line (a + maybe) so it creates a new line underneath, with content editable, where the user can create a new list item
• make sure all that can be done from the keyboard as well, and touch