feat: New dialog service (#1202)

* Add dialog provider boilerplate and improve provider imports

* Add react-draggable dependency

* Add dialog service boilerplate

* Refactor modal to use react-modal and remove dependency on modal themed styles

* Update cinedialog to use new dialog provider

* Add multiple dialogs and refactor provider (dialogs)

* Set app root (modal)

* Add modal zindex bigger than tooltip

* Block drag on buttons/svgs/paths/input and improve jsdoc

* Use guid util to generate dialog ids

* Explicit props in dialog provider

* Improve jsdocs

* Fix tests broken

* Fix boundaries calculation

* Remember last dialog position

* Update providers location

* Add scroll to modal

* Add toggable button toolbar and fix css modal

platform/viewer/src/components/Header/Header.js

@@ -49,7 +49,6 @@ class Header extends Component {
         onClick: () =>
           show(AboutContent, {
             title: t('OHIF Viewer - About'),
-            customClassName: 'AboutContent',
           }),
       },
       {