Apparently, we were changing signs of 1e-2 to 1e+2 when doing
parenthesis simplification...
Automatically add labels, titles and grids to plotcoeffs plots.

Closes #1272.
Merge branch 'hotfix-chebgui-parSimp' into fix-chebgui-IVPs
Getting rid of multiline button strings, and plural (s)-s.
Getting rid of length of solution and max length in pde15s plot titles.
Deleting Lorenz BVP demo.
Changing xlabel in trigtech case to "Wave number", as suggested by @gradywright.
Merge branch 'feature-plotcoeffs-info' into fix-chebgui-IVPs
Getting rid of extra white space in info for linear BVPs.
Finish putting ODE and EIG panels creation into -m files.
Finish setting up panels for PDE problems.
Finish setting up a panel for the EIG options.