Increase usability by swapping positions of options div and logo div

[jokkedk]

What steps will reproduce the problem?

1. Open the index page

What version of the product are you using? On what operating system?
Webgrind v1.0, RHEL

Profiler output files can have very long names. I use the
cachegrind.out.%R.%p format which creates lengthy file names. The "options"
div floats to the right of the browser window, so the biggest part of
filenames in the "dataFile" dropdown is invisible.

Proposed solution:
Make the "options" div float-left and the "logo" div float-right in
/styles/style.css

[rovangju]

Seconded!