Add support for symlinked folders in dashboard provisioning

This reverts commit d089b5e0.

Draft: What's new in v5.2

Support provisioning in HA setup where modtime differs

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alert list panel: show alerts for user with viewer role

Closes #12132

changelog: add notes about closing #11167

remove changelog note

reformat alert_test.go

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elasticsearch: alerting support

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alert list panel: filter alerts by name, dashboard, folder, tags

- added Prometheus query date alignment

Handle all replacements if interval template variables in the client.
Fix issue with client and different versions.
Adds better tests of the client

[skip ci]

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changes to save modal when saving an updated dashboard

Changed time range and variables are now not saved by default, 
you'll need to actively choose if you want to save updated time 
range and or variables.

[skip ci]

Validate uid when importing dashboards

fixes #11958

devenv: initial scripts for setting up devenv

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Fix CSS to hide grid controls in fullscreen/low-activity views