Table Threshold colors don't work

__Steps to reproduce:__
List the minimal actions needed to reproduce the behavior.

1. Create a table
2. Set Threshold colors
3. That's the whole list

__Expected behavior:__
Describe what you expected to happen.
Cells should be colorized according to the thresholds
__Actual behavior:__
Describe What actually happened.
No colors.
__Environment info:__

* System info: Run `uname -srm` and copy the output here
* InfluxDB version: Run `influxd version` and copy the output here
Influxdb V2 Alpha 18 (actually, compiled from `master`
* Other relevant environment details: Container runtime, disk info, etc

__Config:__
Copy any non-default config values here or attach the full config as a gist or file.

__Logs:__
Include snippet of errors in log.

__Performance:__
Generate profiles with the following commands for bugs related to performance, locking, out of memory (OOM), etc.

```sh
# Commands should be run when the bug is actively.
# Note: This command will run for at least 30 seconds.
curl -o profiles.tar.gz "http://localhost:8086/debug/pprof/all?cpu=true"
curl -o vars.txt "http://localhost:8086/debug/vars"
iostat -xd 1 30 > iostat.txt
# Attach the `profiles.tar.gz`, `vars.txt`, and `iostat.txt` output files.
```

No source files, tests, or entry points are named. Start by reproducing the table threshold-color behavior in the UI and locate the table implementation; done means cells display the configured threshold colors, with a regression check for the reported steps.

Written by the indexing model from the issue text.