Simple grouping for Monitor ping + query pings

**Describe your feature request**:
Given a possibility to create a group identified by just it's name and a section where you can manage the belonging domains to such group/collection. Given this the Monitor ping interface would become more like a list of groups and domains as its children. Like:
```
-> Group 1 ---------------------------------------------------- [quick statistics] [open/close arrow]
- example.com
- example.org
- etc.
```
that can be opened or closed.

As a second inclusive feature it would be nice to be also able to add pings against full query paths and give a more descriptive "Name" to each ping, something similar to what I can do in this [android app](https://play.google.com/store/apps/details?id=com.maoux.ismyserveronline):

I'm open to sponsoring this feature request, just let me know to what it would amount.

Comece pela interface de ping do Monitor e rastreie como os domínios monitorados e os nomes de ping são representados atualmente. Esclareça a hierarquia de grupos, o gerenciamento de domínios, o suporte completo a caminhos de consulta e os nomes descritivos antes da implementação; considera-se concluído quando os grupos puderem ser abertos ou fechados e tanto os pings de domínio quanto os pings de caminho de consulta puderem ser gerenciados com nomes personalizados.

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