First, this is a great example of why you need to make a restore point as soon as you install and do the first round of updates. Then you can just do a system restore to take it back to baseline. (Check to see if one was already made. I have Lite 3.8, and the restore app is different than 4.x. In 3.8 it's called Systemback, but in 4.x I think it's called timeshift.
You can fix the panel by right-clicking on it, choosing Panel Preferences, and then using the grid to customize it.
You can also delete the messed-up panel and then create o new one. Just hit the - sign next Panel 1, at the top of the grid. Then hit the + sign. A new panel will be created, which you can then customize.
You can move items by right-clicking them and then dragging them.
you can add icons to the panel by right-clicking them in the start menu and choosing "add to panel." Also, check out the settings options, there are ways to deal with the panel there as well.
You can fix the panel by right-clicking on it, choosing Panel Preferences, and then using the grid to customize it.
You can also delete the messed-up panel and then create o new one. Just hit the - sign next Panel 1, at the top of the grid. Then hit the + sign. A new panel will be created, which you can then customize.
You can move items by right-clicking them and then dragging them.
you can add icons to the panel by right-clicking them in the start menu and choosing "add to panel." Also, check out the settings options, there are ways to deal with the panel there as well.