[FIX] sap.m.ActionSheet: Incorrect box-shadow fixed
[FIX] sap.m.ActionSheet: Incorrect box-shadow fixed

- As a result of the following commit: 4658199, some of the
sap.m.ActionSheet styles were overwritten.
Now, they are stronger in order to be applied the correct styles.

BCP: 2070368612
Change-Id: Ib66fbbd0c2d84045e4a5d90855971f7a68589a84

SAP/openui5,SAP/openui5,SAP/openui5,SAP/openui5