Add confirm delete to File Manager and Common Coordinates list

[nseidle]

From #378

In the File Manager tab, when deleting a file with the Delete button, it would be good to add a confirm option, to avoid accidental deletion.

In the Base Configuration tab, in the list of saved base coordinates, it would be good to also add an option to confirm, when deleting a base, to avoid accidental deletion.

[nseidle]

This was fixed in v3.1. Please let us know if it is still an issue.

[amlago]

¨In the Base Configuration tab, in the list of saved base coordinates, it would be good to also add an option to confirm, when deleting a base, to avoid accidental deletion.¨

This was not contemplated in the latest version of the firmware.

The confirmation to delete files from the SD if it works very well.