Test that storage panel is present and that it contains correct data for local and session DOM storages.

Populated local and session storage
Did show: Local storage
Did show: Session storage
Local storage content: 
KeyValue pairs: a0=value0, a1=value1, a2=value2, a3=value3, a4=value4, a5=value5, a6=value6, a7=value7, a8=value8, a9=value9, resource-history{}
Session storage content: 
KeyValue pairs: b0=value10, b1=value11, b2=value12, b3=value13, b4=value14, b5=value15, b6=value16, b7=value17, b8=value18, b9=value19, 
DONE