Reactos

[EXPLORER] Start menu: Fix Small Icons flag (#6651) master

Follow-up to #6646. Fix wrong flag use: #6646 (comment) JIRA issue: CORE-19494 - Delete SmallStartMenu flag (wrong) from _TW_STUCKRECTS2. - Rename _TW_STUCKRECTS2.SmallIcons as SmSmallIcons. - Use SmSmallIcons flag.