Make 'path too long' error more descriptive

[Normalised]

Just updated to 4.0.1.201704171301 from 4.0.1.201704020116 and I now have an error :

The path C:/dev/apps/eclipse/cpp-neon/eclipse/arduinoPlugin is to long

Which prevents the Upload Sketch command from starting.

(I've reverted my install so I can keep working)

[jantje]

This is not a issue but a design decision #705

[Normalised]

Ok, but leaving a previously working install in a broken state with no explanation doesn't seem like the best way of implementing this design decision.

At least a dialog or warning explaining that 'The installation path is too long and the plugin will no longer function correctly' would go a long way to helping.

[jantje]

Didn't you get a dialog box?

[Normalised]

Yes, but it just says there's an error and that path is too long. Not friendly or helpful.

I suggest:

Due to issues with long pathnames on Windows, the plugin installation path must less than 40 characters. Your current path: PLUGIN_PATH is too long and the plugin will no longer function correctly
Please visit #705 for details.

[jantje]

I hope you like the new message more

[Normalised]

Fantastic 👍