feature requests somewhat related to testing of equation library

[prismv]

It is a little too tempting to use UP to move up in the equation library hierarchy (instead of LastMenu). It might be an idea to always show an up arrow at the g-F6 menu position.
Thinking radically, it would be an idea to make the boxes for F1 to F5 wider to achieve better readability of the text, and to reduce the width of the F6 menu items to arrow size plus some space.

Implementing CLVAR would help to keep the status files clean when testing the equation library.

[c3d]

Interesting. I had noticed the problem and I was considering something along the lines of (taking #1421 into account):

1. When you start solving an equation, it creates a directory for it automatically
2. That directory contains a CustomMenu variable that points to the solver menu
3. VAR would, under some conditions, use CustomMenu as a way to select the default menu for current directory

So the way this would work is:

1. You enter an equation. As a result, both the current menu and the VAR key bring you to the equation solving menu
2. If you use UP, you exit the directory containing the variables and the custom menu, all you see is one directory, so minimal clutter
3. Purging that directory is enough to have a clean state.