* Created troubleshooting - permissions

* Additional links and reorg to troubleshooting

Since Cypress is need, we need to cache ~/.cache/Cypress as well.

Use an improved semantic validation layered on top of the existing
resolver (around ~40 LoC) instead of its own dedicated logic
(~240 LoC).  Not only the improved type-checker is leaner and faster,
it's also more accurate in some corner cases.
The type-checking process is also deferred to the compilation stage,
instead of earlier in the parsing stage.

* Enable Postgres driver to use secrets for configuring SSL parameters

Adding secret related properties for SSL options to Postgres driver

Move `conn-props->secret-props-by-name` to secret.clj since it's needed directly there, too

Add `us-east-2-bundle.pem` to `test-resources/certificates` for testing Postgres with SSL connectivity to our RDS instance (and a README.md explaining how it differs from the existing `ssl` directory)

Updating `value->file!` to have better logic for building the error message when the existing file is not found (for better UX from the Database admin page)

Updating frontend to support the `visible-if` value being an array, in which case any value may match the current details value, in order for that field to be visible

Adding secret related properties for SSL options to Postgres driver

Updating CircleCI config.yml to refer to the RDS instance when running Postgres SSL test

Implement server side expansion of transitive visible-if dependency chain

Update shouldShowEngineProvidedField on client to consider multiple key/value pairs in the visible-if map, and only show the field if ALL are true

Adding new test to confirm transitive visible-if resolution, and cycle detection

Add Cypress test for SSL field visibility

* restyle the dataset education modal

* restructure the modal code and styling

* add t tags to strings

* move Popover to subfolder

* Add TippyPopover component

* Add popover theme styling

* Add/use EventSandbox component

* make TippyPopover lazy

* improve demo page

* add unit tests for TippyPopover

* let most defaulted props be overridable

* rename cypress helper fn

* clean up .info example