Update theme - Githubissues

Resolves #8

Adds basic theme as the default, basic icon and disables theme changing/selection from actionbar
Still need to do heavy cleanup/removal on old theme files and config settings. Let's keep it simple.
Need to add new navcolor as actionbar background
Research ic/mip icon stuff and add different sizes (I added the icon in a simplistic way)

CryptoGrampy / xmr-pocket-node