richedit: Pressing tab with selection back to start of table.

[Dylan Smith]

This inconsistency can be checked with the following steps:
1. Modify wordpad to use riched32.dll to use the old table implementation
(the new table implementation also has this behaviour but it cannot be
tested in wine without the correct selection behaviour)
2. Open an rich text file containing a table with text after it.
3. Select from the text after the table to the start of the table.
4. Press the tab key.

The second tab should be selected, but in wine it would replace the
selection with a tab since this is the correct behaviour when selecting
from the start of the table.

This is a fix to a previous patch I submitted:
bf5ccefc4cf6ecdb2c15bf0eb70dfadee241ad65
richedit: Handle tab key properly within table cells.
---
 dlls/riched20/editor.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
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