Clearing date or number column's cell value is not possible.

[gedinakova]

Description

Describe the issue.

• igniteui-angular version: 7.2.x, 7.3.x
• browser: N/A

Steps to reproduce

1. Run DEV demos
2. Navigate to Grid Column Moving sample
3. Double-click in a cell in "DateCreated" column
4. Click the "X" button to clear the value
5. Click on another row to commit the change

Result

The cell's value is reverted to the initial one.

Expected result

The cell should be empty.

Note:

In a number column, the value is converted to a zero which may not be the desired result.

[nrobakova]

This bug is fixed only for the date column. For the number column this behavior is by design.
As it is written in the link:
"For number data type, default template is using igxInput type="number", so if you try to update cell to a value which can not be parsed to a number your change is going to be discarded, and the value in the cell will be set to 0."