Apply MQE on General and Virtual-Database layer UI-templates.

[wankai123]

1. Sync UI module fix: show error messages and update style for no data skywalking-booster-ui#279
2. When MQE operation single-type result value is null, will return a null value item in the results list rather than return an empty result list.

• If this pull request closes/resolves/fixes an existing issue, replace the issue number. Closes #.
• Update the CHANGES log.

[wu-sheng]

LGTM