I have two similar, but different issues with applets.

First, a friend that I have been trying to help somehow deleted the main application launch bar panel, (or is it a task bar?), which was installed at the bottom of the screen.  I successfully restored the panel, and most of the items I thought it came with, but could not find "Quick Launch", "Hide/Show Info", "Weather", and "Waste Management".  Where do I find those items, or how do I restore them to the panel?  The version is 16.04.1

Second, on my own computer, which runs 12.04.5, the weather widget (or applet, or whatever it is) wasn't working, so I deleted it, (with Synaptic, I think), but it left behind its icon in "Accessories" menu.  I'd like to clean that up, if possible.  Is there a way?  I'd even like to install a weather app that works, but from what I've read, most weather apps don't work in Linux.  Suggestions?  I know that's a different issue, so should I open a new thread for that?

Thanks,
Westport