include the 95% CLs around the SSD on the SSD plot

[sebdalgarno]

From shinyssdtools created by sebdalgarno: bcgov#153

only possible after CI is generated from bootstrap sampling?

in email from Rick:

The other thing I was going to raise this morning was about the ability to include the 95% CLs around the SSD on the SSD plot. I can’t remember why this wasn’t on the list of functionality improvements, but many users like to be able to plot the 95% CLs around the SSD. This isn’t so much for guideline value purposes but for risk assessment purposes. From memory, in Burrlioz we had the ability to select or de-select the plotting of the 95% CLs.

Is this a possible addition? Note that it is not a requirement for ANZG Guideline purposes, so could be done on a later timeframe, but it would increase the versatility of the package.