The Steinhart-Hart algorithm allows more precise thermistor
tables, but also requires more parameters, which aren't
available for all thermistors. Accordingly, add support for both,
the traditional logic using the beta parameter as well as the new
one.
This also adds thermistor-presets, so users can simply choose
from a pulldown-menu to set their thermistor.
Also, identical thermistors get merged into one table, saving
binary size.
Last not least, a few bugs in this area got fixed.
Usually, all these things go into separate commits, but they were
contributed all in one and separating them is a bit error-prone
for little gain.
This should address issue #130, #134 and #135.
This is the expected outcome, so explicitely reporting this, with
requiring the user to click a dialog box away, is kind of clutter.
This should solve issue #136.
Previously, loading default configurations for board or printer,
then modifying them without saving them, then attempting to
build lead to a big mess, like attempting to save the board file,
failing in doing so and then building anyways.
Likely users don't care too much about the name of the saved file,
so they likely use the default ones. If they mess up, they also
likely want to return to the original, but, d'oh, it's overwritten.
Don't let this happen, enforce a non-original file name for user
saves.
In other words: don't let users shoot themselfs into their foot.
jbernardis
Markus Hitter