Update item_activity_history_line.yaml

[dapuzz]

undefined zone total time

[kloggy]

Hi, thanks for these changes. As I said in the readme I am not a Javascript programmer, I am learning as I go! How is your version better than mine? I don't doubt it, I just wondered?

[dapuzz]

I am not a js developer either :-D this just fix when you have less thatn 8 zones you get an "undefined" that breaks the script

[dapuzz]

Oops,I deleted the commit by mistake. Junior user of github too!

[kloggy]

Ah, I see...
Maybe you you have solved a problem I was also having which I solved by changing this section to include an else.

styles:
  card:
    - display:
        [[[
          var zone = '{{ zone }}';
          zone = Number(zone.substring(4, 5));
          var number_of_zones = Number(states['input_number.irrigation_number_of_zones'].state);
          var show_history = states['input_boolean.irrigation_show_status_history'].state;
          if (zone > number_of_zones ||
              show_history == 'off' )
            return 'none';
          else return null;
        ]]]

But I too am junior with Github and I did it by editing the file directly.
Unless of course this is a different problem? But mine works with less than 8 zones.

I also added the else in item_activity_previous_line.yaml