EZP-32387: Fixed text block toolbar alignment

[konradoboza]

Question	Answer
Tickets	EZP-32387
Bug fix?	yes
New feature?	no
BC breaks?	no
Tests pass?	yes
Doc needed?	no
License	GPL-2.0

JIRA excerpt:

When editing a Page Builder, the Rich text inside a Text block is unconfortable to use in certain cases. Sometimes, impossible to use. When you click on align right on the toolbar inside the Text Block, the toolbar aligns itself to the right as well. But the toolbar collapses and a part of it is hidden. Also a scrollbar appears on the bottom of the window, but impossible to scroll.

Steps to reproduce:

1. Install a clean version of Ibexa V.3.3
2. Edit a landing page
3. Add a text bloc inside the landing page(drag and drop)
4. click on the content block of the Text Block and see the toolbar appears
5. click on align right button
6. You will notice that a part of the toolbar is missing and the window has a scrollbar on its bottom. Try to use that scrollbar. You cannot.

PR for 3.x (targetting ezplatform-richtext) will be created once this solution is approved.

Checklist:

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

[konradoboza]

After internal sync with @dew326 we decided to introduce this change also in the default RTE view.

[lserwatka]

You can merge it up now.

[konradoboza]

Done in:
2.3: 4be0503,
master: 337ee28.