Hello,

When using <tt>fossil ui</tt> on a repository, and then on <em>another one</em>, using same port, the logo and the stylesheet for the first repository are still in browser cache, and therefore the browser is not displaying what it should.

Proposed workaround:
  *  Each time the logo or the stylesheet changes, compute its new SHA1 sum
  *  Embed URIs of this form in the HTML code: <tt>$baseurl/logo/{LOGO_SHA1SUM}</tt> or <tt>$baseurl/style.css/{STYLESHEET_SHA1SUM}</tt>
  *  On client side (browser) each logo and stylesheet will be cached, but every time a change is needed it is automatic
  *  On server side, optionally ignore the <tt>/SHA1SUM</tt> part in the URL, and always serve current logo and stylesheet as the previous ones are not stored.