Merge pull request #2820 from exadel-inc/docs/update-migration-guide-…

…5.0.0

docs: migration guide update according actual state

site/views/blogs/ESL v5.0.0 Migartion Guide.md

@@ -57,10 +57,15 @@ The points not marked with `🔧` in the breaking changes section are covered by
       Note that `activator` property change now is the part of main toggleable flow.
     - `this.open` of Toggleables doesn't update until super.onShow/super.onHide is called. 
       Make sure you update `this.open` synchronously or manually notify consumers in case the super call of `onShow/onHide` should be postponed.
+  - #### A11y improvements and focus management (affects ESlPopup)
+    - `a11y` option introduced and now used to control the focus management and a11y for `esl-popup`, `esl-tooltip` (footnotes), `esl-share`, `esl-select` (dropdown).
+      Option available on `ESLToggleable` level and controls focus flow and close on outside action feature.
   - #### ESL Triggers API Changes
     - `ESLTrigger` does not have target defined to `::next` by default. You should always define the target explicitly.
   - #### ESL Panel and Panel Group
     - `fallback-duration` is no longer in the JSX shape of `ESLPanel` and `ESLPanelGroup`.
+  - #### ESL Popup
+    - Attribute `disable-arrow` no longer supported. Use class `disable-arrow` instead.
 
 - ### ESL Footnotes
   - `ESLNote` now based on `ESLBaseTrigger` so active marker now called `active` instead of `tooltip-shown`.