Less scary message with Ctrl-C, remove gcode viewer for android

[jamesgao]

Let's try this again, this time on the devel branch!

On all android devices I've tried this on, the gcode viewer crashes the browser very hard because there's not enough RAM on the devices to load up large gcode files. This short snippet simply removes the gcode-related elements if it detects an android browser.

While I realize that this is sub-optimal in the off chance you're running android on a full blown computer, all devices I've tried this on from a brand new Moto X to a Nexus 10 tablet has managed to crash after loading the gcode viewer. Thoughts on this change?

[savorywatt]

I'm not crazy about simply removing it based on what browser. I'd prefer a warning or asking them to confirm / modify a setting rather than a silent fail.

[foosel]

Yeah, that (among time issues, it's been a bit crazy lately) is one of the reasons I haven't merged it yet. I see the necessity, I'm not sure about the best way to solve that issue though.

One way I thought of would be to somehow tie it to the existing setting for en/disabling the visualizer. That one's server side though, so I'm not that certain yet how exactly to go about this without running into a whole lot of other issues.

[benpye]

Have you tried it on high end devices with Chrome? I don't see say the Nexus 5 or Nexus 4 having issues, then again I may be wrong.

[jamesgao]

As I mentioned, I've seen the crash on a Nexus 10 and a Moto X, both very new devices. I've been trying to integrate a checkbox option into the settings that allows you to toggle the feature, but I haven't really had the time.

[foosel]

Sorry for this staying open so long. I just now merged it onto devel, but removed the Android detection stuff, since with commit ad556e7 the gcode viewer now is a bit more intelligent and refuses to render large gcode files directly (different thresholds for mobile and desktop browsers), instead displaying an "are your really sure you want to do this, this may crash things" message to the user.