Showing Course rather than Courses (or program/s) when there is only 1 to display #2139
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What are the relevant tickets?
Closes https://github.com/mitodl/hq/issues/2488
Description (What does it do?)
Adds a function to render the correct display text on the desktop view for 1 course or program as opposed to multiple (without an s to make the noun plural).
How can this be tested?
Create a department that only has one course and/or one program assigned. You should see the text change from 1 courses (in current main branch) to 1 course when you select that department on the catalog page.