Uptime tables need more detailed accessible descriptions

[barlowm]

Table

Steps to reproduce (assumes NVDA or JAWS Screen Reader or similar)

NVDA Screen Reader is a free Screen Reader which can be downloaded from the NV Access Website
Deque has a page of shortcuts for help on using NVDA as well as a Quick Reference Guide for using NVDA

1. Launch NVDA from the workstation
2. Open the uptime page in the browse.
3. Press "T" to navigate to the first (and press "T" again to navigate to subsequent tables, or Shift-T to navigate to the previous table).

Actual Result

There are two tables on the page (Monitor status and Error list) have captions but the captions provide insufficient information about the table
When locating the Monitor status table (for example) with the Screen Reader it says:

Table with 6 rows and 6 columns. Below is a table of 5 items

The Table with 6 rows and 6 columns is generated automatically by the screen reader.
The Below is a table of 5 items is retrieved from the table caption tag

Expected Result

A better caption would be something to the extent of:

"Monitor Status table with 5 rows of data and columns for "Status", "Last updated", "ID", "URL", IP", and "Monitor History" 

Which provides the name of the table, the names of the columns within the table and the number of actual rows of data within the table.

Meta Issue:

Accessibility Audit for Kibana 7.0
Make Uptime App Accessible for 7.0

Kibana Version:

7.0

Relevant WCAG Criteria:

[WCAG Criterion](link to https://www.w3.org/WAI/WCAG21/quickref/?versions=2.0)

WCAG 2.0 1.3.1 Info and Relationships (Level A)

[elasticmachine]

Pinging @elastic/uptime

[barlowm]

@justinkambic

[elasticmachine]

Pinging @elastic/eui-design (EUI)