message: add a slider in the sidebar
diff: :: StoryMenu
  +<<link "Sliders for $currentPassage.name">>
  + <<switch $currentPassage>>
  + <<case "tavern">>
  + <<goto "InitTavern">>
  + <<case "smithy">>
  + <<goto "InitSmithy">>
  + <<case "alchemist">>
  + <<goto "InitAlchemist">>
  + <<case "GeneralStore">>
  + <<goto "InitGeneralStore">>
  + <<default>>
  + <<goto "TownOutput">>
  +<</link>>
  +
  [[Toolbox]]
  [[Settings]]
  