Correct colspan count in TD tag (service status)

There are eight columns in the service status details list table:

- (1) Host
- (2) Service
- (3) Status
- (4) Last Check
- (5) Duration
- (6) Attempt
- (7) Status Information
- (8) Check box

This patch corrects the colspan count to 8.

Signed-off-by: Michael Friedrich <michael.friedrich@netways.de>

fixes #4961
fix typo in comment

fixes #4960
update Changelog/Thanks from user patches

refs #4961
refs #4971
Add line number information to config verification error messages.

Refs #4967
add a testcase and update changelog for #4967

refs #4967