Some columns that are next to column-groups cannot be resized after moving was performed

[tachojelev]

Description

Some columns that are next to column-groups cannot be resized after moving was performed.

• igniteui-angular version: 6.1.x, 6.2.x
• browser: any

Steps to reproduce

1. Run the "Grid Column Groups" dev demo.
2. Try resizing the "ID" column.
   2.1 Resizing works as expected.
3. Move the "General Information" column group on right of the "ID" column.
4. Try resizing the "ID" column.
   3.1 (issue) Resizing cannot be performed. (resizing indicator is gone)
5. Move the "General Information" column group back on the left of the "ID" column.
6. Try resizing the "ID" column.
   6.1 (issue) Resizing cannot be performed. (although resizing indicator is present)

Result

The "ID" column cannot be resized at steps 3.1 and 6.1.

Expected result

The "ID" column can be resized at steps 3.1 and 6.1.

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