Improved files to distinguish subtypes (allows multiple different files tabs at a entity)

Attachments via the improved files
Block thumbnails at mosaico templates as a separate files tab
Some fixes

All not tested yet

client/src/campaigns/helpers.js

@@ -0,0 +1,14 @@
+'use strict';
+
+import {CampaignType} from "../../../shared/campaigns";
+
+export function getCampaignTypeLabels(t) {
+
+    const campaignTypeLabels = {
+        [CampaignType.REGULAR]: t('Regular'),
+        [CampaignType.TRIGGERED]: t('Triggered'),
+        [CampaignType.RSS]: t('RSS')
+    };
+
+    return campaignTypeLabels;
+}