Decode of signed-operation and improved Account view

Added Mac support, decode of signed-operation under offline-signing and reviewed Account section

SHA256 Checksums:

5172da06cd0dac94558bd22dab374080fad2a9c257402c7199186286e07150b2 kukai-darwin-x64_1.1.0.zip
53be12b87f2d9fecc78bebab5b09a9cb9c43de7059ce63c2d4bd6d30e59d8e86 kukai-linux-ia32_1.1.0.tar.gz
5ae40e17922bbe5e6c6ffba862e91c09f0bdb66a346f227edce6c13fe5d14b7c kukai-linux-x64_1.1.0.tar.gz
2504c717317997bd5d66c3c10a2202847831c042acf53c994b7fdbf80dc89705 kukai-win32-ia32_1.1.0.zip
f993a091b6bf449052c921c8302cece99ee08eb1c3f79d015035c28c71f13490 kukai-win32-x64_1.1.0.zip