Navigation and help text for dmesg-warnings

• Remove background color for dmesg-warnings
• Change font color for dmesg-warnings
• Add a help test that indicates that the dmesg contains warnings.
• Add a navigation button to scroll down to the first warning.
• Add mouse hover text to the button.
• Display # of warnings in dmesg.
• Add colors to the test result used in the legend
• Add a sticky button to scroll back to the first warning

This fixes: #79 (closed) , #84 (closed)

Signed-off-by: Bhanuprakash Modem bhanuprakash.modem@intel.com