Expense create dialog as wizard on mobile

[maraf]

• Each "input" as a separate view in single modal.
• At the top list of steps as icons, those with value already provided in color, others as gray scale.
• At the bottom, buttons
  • Back (when there is a previous step)
  • Next (when there is a next step)
  • Complete (when everything is already filled)
• Start with templates (#417).