When "Pin panel to..." is set to Left, panel remains at Right

Problem/Motivation

Starting an upgrade from 2.2.22 to 3.0.4 today, I noticed that our checker panel had moved from the bottom left to the bottom right of the screen. The "Pin panel to..." in configuration is still set to Left, the setting just seems to not have any effect.

I also tested the "Pin panel to..." setting with fresh 3.0.4 and 3.x-dev installs on simplytest.me and experienced the same.

Steps to reproduce

1. Install drupal/editoria11y:^3
2. Navigate to the Editoria11y Setting page: `/admin/config/content/editoria11y`
3. Under Advanced Settings > Theme Compatibility > Positioning, set "Pin panel to..." to "Left"
4. Save your settings.
5. Navigate to the demo: `/admin/config/content/editoria11y/demo` or any other page you might expect the checker panel to appear, like the homepage.
6. Observe that the panel is pinned to the right.

Environment details for bug reports

• Drupal version: 10.6.10
• CSA submodule installed: N
• Exports submodule installed: N
• Site URL:
• Active config:
  

  content_root: ''
  assertiveness: assertive
  no_load: ''
  ignore_all_if_absent: ''
  ignore_elements: '#geofield-map-view-locations-map-map *, .geofield-static-google-map *, .remote-video--embed *'
  panel_no_cover: ''
  embedded_content_warning: ''
  download_links: ''
  link_strings_new_windows: ''
  ignore_link_strings: ''
  link_ignore_selector: 'svg.ext, svg.mailto, .link-purpose-text, .contextual'
  hidden_handlers: ''
  element_hides_overflow: ''
  ed11y_theme: sleekTheme
  panel_pin: left
  shadow_components: ''
  detect_shadow: false
  watch_for_changes: checkRoots
  disable_sync: false
  preserve_params: 'search,keys,page,language,language_content_entity'
  redundant_prefix: ''
  custom_tests: 0
  disable_live: false
  live_h_inherit: ''
  live_h2: 'form[id^="node-"] #edit-body-wrapper .ck-content'
  live_h3: ''
  live_h4: ''
  hide_edit_links: ''
  ck5_table_headers: row
  tests_off: 'CONTRAST_WARNING_GRAPHIC,LINK_CLICK_HERE,LINK_IMAGE_ALT'

  
  If possible, provide any error messages, as well as the browser console output from:
  

  console.log(JSON.stringify(Object.fromEntries(Object.entries(Drupal.Ed11y.State.option).filter(([key]) => !['editLinks','lang','pepper'].includes(key)))));
  

  Console output