feature/KEEP 1209 Keeperhub theme - fix UI anomalies

[taitsengstock]

• overlay system (fix: KEEP-1258 Chain seeding always takes values from env var JSON #166)
• never autofocus mobile (perf: KEEP-1257 Reduce scheduler Docker image from 1.85GB to 267MB #167)
• fix focus for grid on mobile (Add comprehensive KeeperHub tester guide #168)
• overlay fixes (To Prod #169)
• feat: KEEP-1209 Phase 1 parallel theme migration
• Phase 2 - Migrate components
• phase 3 Move KeeperHub Libraries and API Routes
• Migrate schema extensions
• Resolve all linting errors in KeeperHub plugins
• Fix linting errors for build
• Phase 5 reverted as many base files as possible to match upstream main
• Finalise readme
• Create wallet overlay to match new menu structure
• fix type issues from upstream
• feat: KEEP-1209 Keeperhub theme - UI touch ups