import_overview: setting a sane default window in case of reload When the overview is initially opened the default window is start: begin of current hour end: end of current hour depending on interval size the window is widened to e.g. begin and end of day. When a reload is triggered, the reload puts "now" within the selected window when the window was 'hour' it uses start: begin of current hour end: end of current hour which should behave consistent.