fix: png rendering api & timeout parameter now works as it should AND default render timeout increased from 30 to 60 seconds, fixes #8710

* Add new HttpGetResponse struct type
* Modify HttpGet() return to use HttpGetResponse
* Look up _all_ the teams the user is a member of

Some being user visible.

Status code now replaced with Query parameters

the example response body contained incorrect out-of-place data, presumably from a copy-paste operation

Fixes #5515. Flot gauge has its own threshold check that is different
from the threshold check in singlestat. This changes the flot check to
be exclusive (same as the singlestat check). E.g. if the threshold is
10, then the value 10 is over the threshold.

* Fix Labeling issue when hiding Queries.

Issue #8928

* Fix spacing.

* Replacing tabs with spaces.

* Fix for jshint

* heatmap: fix converting error when series contains 0 and log scale is selected, issue #8884

* heatmap: fix app crash when Y min set to 0 with log scale

* heatmap: fix tooltip for 'zero' buckets in log scale

* heatmap: fix tooltip histogram for log scales

* heatmap: fix flicker of the highlighted element

this was caused by too often fired mouseenter/mouseleave events

* heatmap: fix missing X axis option for log scales

* heatmap: fix missing zero bucket in tooltip histogram

settings(change): changed default value for allow sign up to false, closes #8743, and changed default option allow_org_create to false

Fixes #8870. Fixes out of bound exception on adding a math query part
when there is no group by interval (or only one query part).

There are three locations where the `docker run` command is referenced:
- 2x http://docs.grafana.org/installation/docker/
- 1x https://grafana.com/grafana/download?platform=docker

The fix syncs the given `docker run` command arguments with the other two.

* panel-alertlist: use dashboard timezone, fixes #8874

* alert state history: use dashboard timezone, issue #8874

* alert state history: minor refactor

* (prometheus) set focus to top expression when opening editor

* (text panel) set focus to top expression when opening editor

* table-panel: clickable cell link - draft

* table-panel: clickable cell link - fix link target option

* table-panel: fix undefined columnStyle.link

* table-panel: option to highlight cell with link

* table-panel: render variables for all cells in row

* table-panel: remove cell highlighting

* table-panel: add help for URL field

* linkPopover directive for link info in table panel

* table-panel: add link info popover to cells

* table-panel: use native popover instead directive

* table-panel: link drop refactor, remove unused code

* table-panel: fix unclickable link when drop is opened

* refactoring: minor refactoring to #8738, do not think we need a full blown popover for the links, simple tooltip is enough and more efficient, sadly we do not have a modern tooltip framework, still using old bootstrap 2.3 tooltip

* table-panel: add tests for link rendering