Add FLS to GGW_ApplicationCtrl

[cidarm]

OVERVIEW
Add Field level security check to the saveSelectedSectionText Method:

ACCEPTANCE CRITERIA

  @AuraEnabled
    public static void saveSelectedSectionText(String itemid, String blockid){
        GGW_Content_Block__c cBlock = GGW_ContentBlockSelector.queryContentBlockById(blockid);
        // Construct selected Item to update
        GGW_Selected_Item__c item = new GGW_Selected_Item__c();
        item.Id = itemid;
        item.Selected_Block__c = blockid;
        item.Text_Block__c = cBlock.Description__c; // Copy rich text from block to item for edits
        if(Schema.sObjectType.GGW_Selected_Item__c.isUpdateable()){
            update item;
        }
    }

OUT OF SCOPE

BACKGROUND/REFERENCE