Fix BBCode tables overlap with bottom text (Fix #47012)

[jmb462]

Fix #47012

Issue :

In RichTextLabel, text after a [table] element overlaps with table last row if the last row doesn't use all columns.

Before :

Fix proposal :

The height of the row was only added if column == col_count - 1 => if all the columns was used.
I've added an other condition : (column == col_count - 1 || E->next() == nullptr) => if all the columns was used OR if it's the last element of the table (even if it's not on the last column).

After :

[akien-mga]

Thanks!

[akien-mga]

This will need a dedicated PR for the 3.x branch as the code changed a lot in master, and can't be cherry-picked.

[jmb462]

@akien-mga Seems that it will be exactly the same fix at line 825 in 3.2 branch.

if (column == table->columns.size() - 1) ====> if (column == table->columns.size() - 1 || E->next() == nullptr)

Does it really deserve a new PR for cherrypicking ? (If so, I can do it)

[akien-mga]

Thanks, I'll do it then :)

[akien-mga]

Cherry-picked for 3.3.