message: fix(devtools): change links to the angular repo
  Use proper reporting and source code links in the DevTools UI.
  PR Close
diff: <mat-icon>library_books</mat-icon>
  Guide
  </a>
  - <a mat-button class="menu-toggle-button" href="https://github.com/rangle/angular-devtools" target="_blank">
  + <a mat-button class="menu-toggle-button" href="https://github.com/angular/angular" target="_blank">
  <mat-icon>launch</mat-icon>
  GitHub
  </a>
  - <a mat-button class="menu-toggle-button" href="https://github.com/rangle/angular-devtools/issues" target="_blank">
  + <a mat-button class="menu-toggle-button" href="https://github.com/angular/angular/issues" target="_blank">
  <mat-icon>bug_report</mat-icon>
  Issues
  </a>
  