Don't show duration of unfinished builds

Dependencies

• [2] CAFO4ATE Always show the build duration (using the cached build if necessary)
• [*] J5UVLXOK * Start of a basic Catalyst web interface.
• [*] 2GUAKGTB Fix indentation of build.tt

Change contents

• edit in src/root/build.tt at line 125
  [5.3656]

  [2.0]
  + [% IF build.finished %]
• edit in src/root/build.tt at line 132
  [2.347]

  [5.3656]
  + [% END %]