PB-170: TinyMCE Performance is very poor with multiple instances on Stage

- Fix collage overlay positioning tests

Author: davemacaulay

app/code/Magento/PageBuilder/Test/Mftf/ActionGroup/OverlayActionGroup.xml

@@ -161,7 +161,8 @@
         </arguments>
         <!-- Validate bottom edge of overlay -->
         <comment userInput="Validate bottom edge of overlay" stepKey="commentValidateBottomEdgeOfOverlay"/>
-        <executeJS function="return {{page.wrapperJS(index)}}.getBoundingClientRect().top+{{padding.paddingTop}}+110" stepKey="wrapperTopPaddingContent"/>
+        <!-- 30px padding top, 50px min height, 30px padding bottom -->
+        <executeJS function="return {{page.wrapperJS(index)}}.getBoundingClientRect().top+{{padding.paddingTop}}+30+50+30" stepKey="wrapperTopPaddingContent"/>
         <executeJS function="return {{page.overlayJS(index)}}.getBoundingClientRect().bottom" stepKey="overlayBottomPosition"/>
         <executeJS function="return Math.round(({$wrapperTopPaddingContent}/{$overlayBottomPosition})*100)/100" stepKey="overlayBottomRatio"/>
         <assertEquals stepKey="assertOverlayBottomRatio">

app/code/Magento/PageBuilder/view/adminhtml/web/css/source/content-type/slide/_default.less

@@ -131,7 +131,7 @@
         }
 
         [data-element='content'] {
-            min-height: 50px;
+            overflow: auto;
 
             img {
                 display: inline;

app/code/Magento/PageBuilder/view/frontend/web/css/source/content-type/banner/_default.less

@@ -47,6 +47,7 @@
 
         [data-element='content'] {
             min-height: 50px;
+            overflow: auto;
         }
 
         .pagebuilder-banner-button {

app/code/Magento/PageBuilder/view/frontend/web/css/source/content-type/slide/_default.less

@@ -57,6 +57,7 @@
 
         [data-element='content'] {
             min-height: 50px;
+            overflow: auto;
         }
 
         .pagebuilder-slide-button {