Plus42 Equations, Preview Release

[Thomas Okken]

New update. More little things:

1. In the TVM app menu, when the header is turned off, or not showing because the display has fewer than 4 rows: show the P/YR and BEGIN / END information banner whenever P/YR or BEGIN / END settings are changed.
2. The messages shown by pressing a variable key with Shift, in VARMENU, SOLVER or ∫f(x) menus, or TVM, are supposed to go away after 2 seconds or after the key is released, whichever comes later... but they weren't disappearing if the key was held down for more than 2 seconds. (Free42 has this bug as well; it will be fixed in the next release.)