PB-341: Save content as template

- Restrict input to 100 characters

Author: davemacaulay

app/code/Magento/PageBuilder/view/adminhtml/web/template/modal/template-manager/save-content-modal.html

@@ -27,7 +27,7 @@
             </label>
             <% } %>
             <div class="admin__field-control">
-                <input type="text" data-role="promptField" id="prompt-field-<%- data.id %>" class="admin__control-text" <%= inputAttr %>/>
+                <input type="text" data-role="promptField" id="prompt-field-<%- data.id %>" maxlength="100" class="admin__control-text" <%= inputAttr %>/>
             </div>
         </div>
         <% if(data.templateTypes){ %>