Effort field taking values other than number also.

[kumarkishore1001]

Description
Effort field taking values other than number also.
This should only allow user to enter numeric value.

Steps to Reproduce

1. Login to the application
   2.Create a product
2. Create a Requirement and try to enter non numeric values to the effort field.

Enter non numeric values are allowed, although on saving it changes to default.

Video
https://screencast.com/t/rcc85D4Vq

[kumarkishore1001]

This issue exist in 1.8 release also.

[AlanClifford]

The effort field accepts non-numeric input without error but doesn't update the database record. It also accepts negative numbers and insanely large values 999,999,999 which do get stored in the database record.