Ongoing: Sort out CSS selector specificity

[jonnystening]

There are a number of examples of over specific CSS selectors in the code base.

We should not be targeting symbols like below...

.symbol.symbol-american-express {}

This should be simply...

.symbol-american-express {}

Other examples include...

.icon.icon-size-lg {}
.logo.logo-bom-shield {}
.logo.logo-bsa {}
etc.