fix(webapp): back to app returns to the current org (#4632)

## Summary

Following a link straight into an organization's settings (for example
the usage limit link in a billing email) and then clicking "Back to app"
took you to `/`, which resolves to whichever organization you last had
selected, not the one whose settings you were looking at. The button now
links to the organization in the URL, so you land back in the org you
came from.

The org index route already redirects to the best project in that org,
so the destination is unchanged apart from being the right org.

Account settings still links to `/`, since that page is not org scoped
and has no org to return to.

.server-changes/settings-back-to-app-org.md

@@ -0,0 +1,6 @@
+---
+area: webapp
+type: fix
+---
+
+The "Back to app" button in organization settings now returns you to that organization instead of your most recently used one.

apps/webapp/app/components/navigation/OrganizationSettingsSideMenu.tsx

@@ -14,13 +14,13 @@ import { useFeatures } from "~/hooks/useFeatures";
 import { type MatchedOrganization } from "~/hooks/useOrganizations";
 import { cn } from "~/utils/cn";
 import {
+  organizationPath,
   organizationRolesPath,
   organizationSettingsPath,
   organizationSlackIntegrationPath,
   organizationSsoPath,
   organizationTeamPath,
   organizationVercelIntegrationPath,
-  rootPath,
   v3BillingLimitsPath,
   v3BillingPath,
   v3PrivateConnectionsPath,
@@ -72,7 +72,7 @@ export function OrganizationSettingsSideMenu({
         <LinkButton
           variant="minimal/medium"
           LeadingIcon={ArrowLeftIcon}
-          to={rootPath()}
+          to={organizationPath(organization)}
           fullWidth
           textAlignLeft
         >