Sort by "Modified" in Dashboards does not sort by modified date

[sjwang90]

Steps to reproduce:

1. Go to Dashboards page
2. Default page is sorted by Name, Click "Modified"
3. Sorting by Modified does not sort by last modified date, continues to sort by name

Expected behavior:
When select "Modified", expect dashboards to sort by modified in asc/desc order

Actual behavior:
Sorts by Name

[karel-rehor]

I can confirm this issue is showing up in the nightly builds

ts=2019-11-25T08:43:10.485363Z lvl=info msg="Welcome to InfluxDB" log_id=0JKRVw5G000 version=nightly commit=ce9ce176d build_date=2019-11-25T07:23:15Z

Adding label 'selenium/nightly' because we want to cover this in the nightly tests.

Related Issues
#15379
#15247
#14923
#13950

Note the attached json shows the creation/modified order of the dashboards

dashboards-order.json.txt