Merge pattern, regex, advanced search flavors into query params

[nimmolo]

Merges Query params for searches into the base class for Observation, Location, Name. (This has already been done for all the other searchable models.)

Also, folds in ImageInsideObservation and ObservationNeedsNaming flavors into :all.

There should be no change in front-end behavior, apart from a few (improved?) query result titles in Advanced Search.

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Requested front-end spot tests

• Advanced search
• Pattern search
• Observations Needing Identification
• The obscure? but probably useful ability to navigate between the show image pages of all images occurring within a query of "Observations of x". In other words, the "outer" query is your Obs query: you should be able to step between each image of each obs, in order, and it should then take you through the images of the next obs, and the next, etc.

[coveralls]

coverage: 93.523% (+0.005%) from 93.518%
when pulling ac55640 on standardize-controller-indexes
into 5d35379 on main.