Revert "fdo#73151 Always open Styles&Formatting dialog in the sidebar"

This reverts commit 473ed449a4b6f550dc1af47a07c6e0ef243a98b2, which made
JunitTest_toolkit_unoapi fail, as
AccessibleDropDownListBox.createTestEnvironment
(qadevOOo/tests/java/mod/_toolkit/AccessibleDropDownListBox.java) was no longer
able to find its AccessilbeRole.COMBO_BOX AccessibleDropDownListBox, which it
apparently expected to find in a docked stylist (cf. DesktopTools.dockStylist
in AccessibleDropDownListBox.initialize).