Polish: UI theme colors, onboarding dismiss, Export button in sidebar (#270)

* Light mode style fixes

* Fix dismissing onboarding for nested routes

* Refactor: move export button to  user side panel

* Refactor: add project data to modeling page loader

* Add new ProjectSidebarMenu

* Convert AppHeader to use ProjectSidebarMenu

* Move ExportButton to ProjectSidebarMenu

* Fix: hide default dir setting in Web

* Add DownloadAppBanner when in Prod

* Add unit tests to ProjectSidebarMenu

* Tiny CSS rounding tweak to sidebars

* Fix formatting in unit tests

* Update icons and logos to use full-color Kitt

* Fix: dim UI on camera drag, not click

src/routes/Onboarding/Introduction.tsx

@@ -23,7 +23,7 @@ export default function Introduction() {
         <div className="flex justify-between mt-6">
           <ActionButton
             Element="button"
-            onClick={dismiss}
+            onClick={() => dismiss('../')}
             icon={{
               icon: faXmark,
               bgClassName: 'bg-destroy-80',