Speicifc statistics about deleted pages and attachments displays N/A value in total column for wiki without deleted content

[petrenkonikita112263]

Prerequisites

• local XWiki instance 14.10+ with Tomcat servlet and any supported DB
• installed Admin Tools (Pro) 1.0-rc3 on main Wiki

Step to reproduce

1. Create a new wiki with default settings and flavor installed
2. Go to Admin Tools home in main Wiki
3. Click on Check pages and attachments recycle bins
4. Observe the result LD table

Actual result

The total column will display N/A* value alongside with 0 value for wiki that doesn't have any deleted content

Expected result

The total column displays only 0 value.