Gallery idr css tweaks

[will-moore]

Various CSS tweaks and small UI fixes:

• Align the 'Search by' text better, remove whitespace above title.
• As suggested: https://github.com/ome/omero-gallery/issues/26#issuecomment-499144751
  • Remove title from search page
  • Highlight the Cell-IDR or Tissue-IDR link when on /cell or /tissue page
• Truncate long author names to fix "Idr0011 is not being parsed properly—see https://idr-testing.openmicroscopy.org/cell/search/?query=Screen%20Type:primary%20screen (scroll down to bottom and see study format is different for idr0011 studies
• Re: "Experiment descriptions (shown as tool tips on mouse over of image windows) vary in length and detail." Can't vary the layout or position of tooltip (depends on browser etc) but have removed 'Version History' from various studies (e.g. idr0036) to reduce length.