parent_aspect_ratio suspicious value handling

ui/src/components/rects/SVGRectText.vue

@@ -33,7 +33,18 @@ export default class extends Vue {
     }
 
     const parent = this.$el.parentElement;
-    return parent.clientWidth / parent.clientHeight;
+    const result = parent.clientWidth / parent.clientHeight;
+
+    // force recompute for suspicious results
+    if (result === 0 || result === Infinity) {
+      // don't loop endlessly
+      if (this.refreshKey < 10000) {
+        this.refreshKey++;
+      }
+      return 1;
+    }
+
+    return result;
   }
 
   public mounted() {