Tomaz implemented this feature in 5.0 for Writer, so it would be useful to also have it in Calc.
The commit - http://cgit.freedesktop.org/libreoffice/core/commit/?id=ca95307638207db5d662059aa61594151a13e927
In bug 91495, Tomaz added the ability to disable the preview, so that should also be implemented with this feature.
Created attachment 121166 [details]
the same in excel
I support this bug request, if I understand it correctly:
Cell styles list on the side bar of calc would be formatted, highlighted and with borders, corresponding to the style. Smth like this
*** This bug has been marked as a duplicate of bug 92380 ***
*** Bug 107540 has been marked as a duplicate of this bug. ***