v1.1.57: fix scenario editor body bug + relativeTime columns + infra UUIDs

- scenario-form.js: fix ReferenceError body is not defined in renderEditor()
- utils.js: relativeTime(iso) → 3ч 12м / 2д 5ч / только что
- instances.js: columns created / modified with relativeTime()
- index.html: instanceUid under displayName in infra column

site/static/js/scenario-form.js

@@ -15,6 +15,7 @@ function showScenarioEditor(def) {
 }
 
 function renderEditor() {
+    const body = document.getElementById('scenario-body');
     const st = scenarioEditorState;
     let html = '<div style="font-size:12px;">';
     html += '<div style="margin-bottom:6px;"><label style="font-size:11px;">Название:</label><br>';