Table styles panel:
+ Added simple table style panel tab icon.
    icon-themes/galaxy/sw/imglst/sf06.png
+ Listing table styles (hierarchical, same order as in container)
+ Listing all table styles (sorted by name).
+ Listing applied table styles.
+ Listing custom styles.
+ Listing hidden styles.
+ Hide/show style.
+ Applying style by double clicking.
+ Highlight current table style.
Everything else yet to be done.

Table styles (SwTableAutoFormat):
+ "hidden" property.
+ "userDefined" property. "Default style" is not user defined. Styles loaded
from tblauto.fmt are also not user defined. Styles loaded from .odt are user
defined. Styles created manually (before binary load/save roundtrip) are user
defined.

Change-Id: I739a48ae1d7ae66f4f8c08076871437ca491bd4e
Reviewed-on: https://gerrit.libreoffice.org/27638Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>