[Behat] Added waiting until RichText toolbar transition ends

[mnocon]

Question	Answer
Tickets	https://jira.ez.no/browse/EZEE-2944
Bug fix?	in tests
New feature?	no
BC breaks?	no
Tests pass?	yes
Doc needed?	no
License	GPL-2.0

Tests error:

        Exception: element click intercepted: Element <button class="ae-button ez-btn-ae ez-btn-ae--unordered-list " tabindex="-1" title="List">...</button> is not clickable at point (150, 346). Other element would receive the click: <div class="ez-richtext-tools">...</div>

          (Session info: chrome=74.0.3729.169)

          (Driver info: chromedriver=74.0.3729.6 (255758eccf3d244491b8a1317aa76e1ce10d57e9-refs/branch-heads/3729@{#29}),platform=Linux 4.4.0-101-generic x86_64) in vendor/instaclick/php-webdriver/lib/WebDriver/Exception.php:144

AlloyEditor toolbar has a transition that takes 0.15s to finish: https://github.com/liferay/alloy-editor/blob/v1.5.21/src/ui/react/src/assets/sass/components/ae-toolbar/structure.scss#L17 and it looks to me like there is no selector we can wait for to make sure the transition has ended.

There is a class alloy-editor-visible, but it looks like it's added when the trasition starts:
https://github.com/liferay/alloy-editor/blob/v1.5.21/src/ui/react/src/components/base/widget-position.js#L205 (and the ae-toolbar-transition is not removed after the animation finishes).

Adding a sleep time of 200ms to make sure that the transition is over should solve the TextBlock issues we're facing currently.

Checklist:

• Coding standards ($ composer fix-cs)
• Ready for Code Review

[micszo]

Let's give it a shot.