Woocommerce-admin: Product report: Incorrect default chart

[LevinMedia]

Describe the bug
The product report is currently using the comparison chart when no products are being compared

To Reproduce
Steps to reproduce the behavior:

On the latest version of master, view the products report, and note the chart layout.

Expected behavior

The chart should use the standard layout until products are selected and compared. For reference, the screen shot below is the standard layout chart on the revenue report. ( The legend should be in the chart header )

[Aljullu]

So, if I understand it correctly, the comparison chart must be shown in these cases:

• _Single product_ + _Variations comparison_/_Top Variations by Items Sold_/_Top Variations by Gross Revenue_
• _Product Comparison_
• _Product Category Comparison_
• _Top Products by Items Sold_

While the standard layout must be displayed in these cases:

• _All products_
• _Single Product_ + _All Variations_

Is it like that @LevinMedia?

[Aljullu]

After speaking with @LevinMedia it looks like for now, the only product page that will display the standard chart is _All products_.

[LevinMedia]

heya @Aljullu ! Per our slack convo:

Standard chart

• Default chart for all reports

Comparison chart

• When a user manually selects and compares anything, we switch from standard to comparison (products, categories, coupons, taxes)
• Product detail report (We switch to the product detail report when a user selects a single product using the "Show single product" filter in the product report, or by clicking the title of a product somewhere in the tabular data. In the product detail report, the product's variations are compared in the comparison chart. For the sake of consistency we still use the comparison chart even if it's a simple product without variations. We treat the simple product as a single variation.)
• any time a user filters a report by "Top" things (IE top products by items sold. This view should also include the select menu that lets a user determine how many top things to show. This is noted in the states section of p6riRB-3jq-p2)