MC-823: Address architecture feedback

-Removed type-nested class from banner

Author: Michael Yu

app/code/Magento/PageBuilder/view/adminhtml/web/template/content-type/banner/collage-centered/preview.html

@@ -5,7 +5,7 @@
  */
 -->
 
-<div class="pagebuilder-content-type pagebuilder-banner type-nested" attr="data.main.attributes" ko-style="data.main.style" css="data.main.css" event="{ mouseover: onMouseOver, mouseout: onMouseOut }, mouseoverBubble: false">
+<div class="pagebuilder-content-type pagebuilder-banner" attr="data.main.attributes" ko-style="data.main.style" css="data.main.css" event="{ mouseover: onMouseOver, mouseout: onMouseOut }, mouseoverBubble: false">
     <render args="getOptions().template" />
     <div class="pagebuilder-banner-wrapper" css="data.desktop_image.css" attr="data.desktop_image.attributes" ko-style="Object.assign({}, data.desktop_image.style(), {paddingLeft: 'calc(25% + ' + data.desktop_image.style().paddingLeft + ')', paddingRight: 'calc(25% + ' + data.desktop_image.style().paddingRight + ')'})" event="{mouseover: onMouseOverWrapper, mouseout: onMouseOutWrapper}">
         <div class="pagebuilder-overlay" css="data.overlay.css" attr="data.overlay.attributes" ko-style="data.overlay.style">

app/code/Magento/PageBuilder/view/adminhtml/web/template/content-type/banner/collage-left/preview.html

@@ -5,7 +5,7 @@
  */
 -->
 
-<div class="pagebuilder-content-type pagebuilder-banner type-nested" attr="data.main.attributes" ko-style="data.main.style" css="data.main.css" event="{ mouseover: onMouseOver, mouseout: onMouseOut }, mouseoverBubble: false">
+<div class="pagebuilder-content-type pagebuilder-banner" attr="data.main.attributes" ko-style="data.main.style" css="data.main.css" event="{ mouseover: onMouseOver, mouseout: onMouseOut }, mouseoverBubble: false">
     <render args="getOptions().template" />
     <div class="pagebuilder-banner-wrapper" attr="data.desktop_image.attributes" ko-style="Object.assign({}, data.desktop_image.style(), {paddingRight: 'calc(50% + ' + data.desktop_image.style().paddingRight + ')'})" css="data.desktop_image.css" event="{ mouseover: onMouseOverWrapper, mouseout: onMouseOutWrapper }">
         <div class="pagebuilder-overlay" css="data.overlay.css" attr="data.overlay.attributes" ko-style="data.overlay.style">

app/code/Magento/PageBuilder/view/adminhtml/web/template/content-type/banner/collage-right/preview.html

@@ -5,7 +5,7 @@
  */
 -->
 
-<div class="pagebuilder-content-type pagebuilder-banner type-nested" attr="data.main.attributes" ko-style="data.main.style" css="data.main.css" event="{ mouseover: onMouseOver, mouseout: onMouseOut }, mouseoverBubble: false">
+<div class="pagebuilder-content-type pagebuilder-banner" attr="data.main.attributes" ko-style="data.main.style" css="data.main.css" event="{ mouseover: onMouseOver, mouseout: onMouseOut }, mouseoverBubble: false">
     <render args="getOptions().template" />
     <div class="pagebuilder-banner-wrapper" attr="data.desktop_image.attributes" ko-style="Object.assign({}, data.desktop_image.style(), {paddingLeft: 'calc(50% + ' + data.desktop_image.style().paddingLeft + ')'})" css="data.desktop_image.css" event="{mouseover: onMouseOverWrapper, mouseout: onMouseOutWrapper}">
         <div class="pagebuilder-overlay" attr="data.overlay.attributes" ko-style="data.overlay.style" css="data.overlay.css">

app/code/Magento/PageBuilder/view/adminhtml/web/template/content-type/banner/poster/preview.html

@@ -5,7 +5,7 @@
  */
 -->
 
-<div class="pagebuilder-content-type pagebuilder-banner type-nested" attr="data.main.attributes" ko-style="data.main.style" css="data.main.css" event="{ mouseover: onMouseOver, mouseout: onMouseOut }, mouseoverBubble: false">
+<div class="pagebuilder-content-type pagebuilder-banner" attr="data.main.attributes" ko-style="data.main.style" css="data.main.css" event="{ mouseover: onMouseOver, mouseout: onMouseOut }, mouseoverBubble: false">
     <render args="getOptions().template" />
     <div class="pagebuilder-banner-wrapper" attr="data.desktop_image.attributes" ko-style="data.desktop_image.style" css="data.desktop_image.css" event="{mouseover: onMouseOverWrapper, mouseout: onMouseOutWrapper}">
         <div class="pagebuilder-overlay pagebuilder-poster-overlay" attr="data.overlay.attributes" ko-style="data.overlay.style" css="data.overlay.css">