Add toPreviousPage in router

- Allows the WorkInProgress cancel & unfocus to go back to the previous
page instead of a default one.
- Change layout of overview buttons
- Add a back button in the overview, only visible in pages with a
sidebar
- Clear the history on augmentation install & on prestige

src/Augmentation/AugmentationHelpers.tsx

@@ -13,6 +13,7 @@ import { SourceFileFlags } from "../SourceFile/SourceFileFlags";
 
 import { dialogBoxCreate } from "../ui/React/DialogBox";
 import { clearObject } from "../utils/helpers/clearObject";
+import { Router } from "../ui/GameRoot";
 
 import { WHRNG } from "../Casino/RNG";
 
@@ -2582,6 +2583,8 @@ function installAugmentations(): boolean {
     augmentationList += aug.name + level + "<br>";
   }
   Player.queuedAugmentations = [];
+  Router.clearHistory();
+
   dialogBoxCreate(
     "You slowly drift to sleep as scientists put you under in order " +
       "to install the following Augmentations:<br>" +