Shorten time period descriptions

[arouinfar]

We currently describe the time periods in three places:

1. Scene Summary: time period is the {{year seventeen fifty}} and there is {{a farm}}.
2. Time Period radio button responsive descriptions: Now there is {{a farm}} in observation window.
3. Explore Mode radio button responsive descriptions: Currently, the time period is the {{year seventeen fifty}} and there is a {{farm}}.

@Matthew-Moore240 and I would like to make these changes.

• For 2020, change the wording from "a large number" to "many".
• In case (2) shorten things to: Now {{time period description}}.
  • 2020: Now {{many homes and factories}}.
  • 1950: Now {{a few homes and factories}}.
  • 1750: Now {{a farm}}.
  • Ice Age: Now {{a large glacier}}.
• In case (3) shorten things to: Time period is the {{year seventeen fifty}}. (This is already included in Further updates to Explore Mode RadioButtonGroup Responsive Descriptions #199.)

[jessegreenberg]

I think I have the above changes complete. Changes were needed for string patterns and logic for each of the above cases so @arouinfar or @Matthew-Moore240 can you make sure each look correct when you verify this issue?

[arouinfar]

Looks good, thanks @jessegreenberg!