Fixed extra margin spacing in collage section when header is empty (#…

…2770)

* added a conditional to only render an h2 when there is a heading

* added whitespace management dashes

sections/collage.liquid

@@ -19,10 +19,12 @@
 {%- endstyle -%}
 
 <div class="color-{{ section.settings.color_scheme }} gradient isolate">
-  <div class="page-width{% if section.settings.heading == blank %} no-heading{% endif %} section-{{ section.id }}-padding">
-    <h2 class="collage-wrapper-title inline-richtext {{ section.settings.heading_size }}{% if settings.animations_reveal_on_scroll %} scroll-trigger animate--slide-in{% endif %}">
-      {{ section.settings.heading }}
-    </h2>
+  <div class="page-width section-{{ section.id }}-padding">
+    {%- if section.settings.heading != blank -%}
+      <h2 class="collage-wrapper-title inline-richtext {{ section.settings.heading_size }}{% if settings.animations_reveal_on_scroll %} scroll-trigger animate--slide-in{% endif %}">
+        {{ section.settings.heading }}
+      </h2>
+    {%- endif -%}
     <div class="collage{% if section.settings.mobile_layout == 'collage' %} collage--mobile{% endif %}">
       {%- for block in section.blocks -%}
         <div