Table dialog showing incorrect number of columns

[Satya Minnekanti]

To reproduce the defect:

1. Open any CK Editor sample and insert a table with default values(3 rows & 2 columns)

2. Open Context menu inside a table cell and bring up the Table dialog.

Expected Result: Table dialog comes up and it shows value 3 for Rows & 2 for Columns

Actual Result: Table dialog comes up and it shows value 3 for Rows but 6 for Columns.

3. Open context menu insert a row before or after an existing row and bring up the Table dialog from context menu.

Expected Result: Table dialog comes up and it shows value 4 for Rows & 2 for Columns

Actual Result: Table dialog comes up and it shows value 4 for Rows but 8 for Columns.

4. Open context menu insert a column before or after an existing column and bring up the Table dialog from context menu.

Expected Result: Table dialog comes up and it shows value 4 for Rows & 3 for Columns

Actual Result: Table dialog comes up and it shows value 4 for Rows but 12 for Columns.

[Jakub Ś]

Reproducible from rev [7204]

[Sa'ar Zac Elias]

TC added: ​Run or ​View source.
Fixed with [7207] as a microchange.