Dygraph Fork for Milliseconds

[cryptoquick]

• CHANGELOG.md updated with a link to the PR (not the Issue)
• Rebased/mergable
• Tests pass
• Sign CLA (if not already signed)

Connect #1449

The problem

Chronograf graphs in UI wouldn't label millisecond or sub-millisecond axes.

The Solution

Fork Dygraphs to our own company GItHub account and apply changes from danvk/dygraphs#777, and then point our project use that repository.

[goller]

Looks like the changelog editing stomped other changes?

[121watts]

This does the thing! These points are all over the 39th second:

[121watts]

I pulled it down and tested it out. LGTM 😄

[goller]

I think this clobbered the changelog

[cryptoquick]

Good catch, Chris. Fixing in master.

[nhaugo]

@cryptoquick couple of issues, when you zoom in and you don't select a full set of data the graph shows no results (which it shouldn't). Also when you get into this state you can no switch time range via the drop down, e.g. try to switch it to past 15 min.

[cryptoquick]

@nhaugo I can only replicate this if I'm using the date picker. If I use 'fixed' query like this in a cell, I can't replicate it:
SELECT mean("value") AS "mean_value" FROM "telegraf"."autogen"."foo" WHERE time > '2017-10-09T20:44:39.000Z' AND time < '2017-10-09T20:44:40.000Z' GROUP BY time(1ms)
It might have something to do with template variables, but I'm not sure. TBH, I'm not sure I'm a fan of not rendering the graph when there are no results. I would actually prefer to use Dygraph to render text on the canvas, so you don't actually take away all of Dygraph's functionality when the dataset empty, and to render empty data sets.