add save when verifyng and uploading (round 2)

[cmaglie]

As discussed on #2214:

• Disable auto-save if the sketch is read-only (i.e. on examples) as suggested by @agdl and @GregWoods
• Fix spelling and minor adjustment on commits as suggested by @matthijskooijman

This pull request close #1934

[matthijskooijman]

Looks good to me.

[JulyJim]

A small notes - it is not clear if "save and compile" was really implemented, but that is not what my comment about.
My current project (on Due) takes 7% of memory and it still takes almost 2 minutes ( on an average ) to fully or partially ( not compiling what did not change) compile.
The "...things changed, compiling all"( not a quote) message SELDOM appears and is followed by "pregnant pause" for almost a minute when nothing gets printed in "progress window".
So if you add "save and compile" it MAY look even more goofy - or is it a Unix -"all OK no response " way?
I feel auto save would be in line with some of the Arduino " do this automatically for newbies benefits" which is many cases ( function prototyping) tries to "do better " than language standards.

[matthijskooijman]

@VaclavSal, Not sure how this is relevant to his PR? When you have verbose compilation is disabled, no compiler output is shown, so you'll have to wait until everything is compiled before you see the result. If you think this is a problem, perhaps you should open a separate issue for it?

As for the "automatically for newbies" thing, this adds an option for autosave, so if it does not fit your workflow, you can just disable it?

[ArduinoBot]

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