Bug 1086563 - Write test to verify offline behaviour of the RocketBar

I'm not 100% sure I agree with the context switching going into the tap...() function, unless that's what we typically do with this sort of thing. 

POM functions that return a new page object allow the calling code to optionally use it. Putting the context switch in means an assumption that the calling code will absolutely use it. I don't know that the search panel should be making that assumption about the test.