[kde-doc-english] A fix for kstars_commands.po

[Antoni Bella Pérez]

  Hi

  Please, solve this misspelling: lt is gt

Advance one step forward in time in the &kstars; simulation of the sky 
chart. The duration of the time step can be configured after pressing the 
little <guilabel>&lt;</guilabel> button on the &kstars; toolbar.

  Would not it be better to use the icon for this item?

  Regards
  Toni