Исправления багов, мелкий рефакторинг

client/components/Search/SelectDateDialog/SelectDateDialog.vue

@@ -96,12 +96,8 @@ class SelectDateDialog {
         this.to = this.splitDate.to;
     }
 
-    isManualDate(date) {
-        return date && utils.isDigit(date[0]) && utils.isDigit(date[1]);
-    }
-
     get splitDate() {
-        if (!this.isManualDate(this.date))
+        if (!utils.isManualDate(this.date))
             return {from: '', to: ''};
 
         const [from = '', to = ''] = (this.date || '').split(',');