test(cypress): Splits selectors into multiple files

[justin-bits]

Resolves #580

• Some performance changes to reduce flaky tests and produce a cleaner pattern to follow when using image comparisons
• selectors.js is now multiple files
• The structure of the selectors were modified to reduce the complexity and length. This results in shorter lines in tests and selectors that are easier to lookup. There was also a significant reduction of duplicate selectors. Dropped the use of _WILDCARD.
• Updates to images as workaround for Default icon for features imported via kml is now a push pin #676
• Significant rework/additions to feature-list.spec.js (which was renamed from layer-features.spec.js to more closely match the terminology used in the application). Some work from Expand test coverage for Feature List dialog #581 completed with this PR.
• Inclusion of workaround for Context menus not always opening from grids #667
• toolbar-right.spec.js now has its own test data
• Added support for running any test case (or group of test cases) in a batch five times in a row to check for flaky tests during test development
• Handles specific console errors that started being thrown by OS. @jsalankey indicated these specific errors are okay to disregard.
• Removed test selectors from OS as substitutes were identified
• Feature size rendering inconsistencies #678 and Tests with ArcGIS state file intermittently failing #680 filed as known issues with the current version of tests/OS

[bradh]

What is the 0] file?

[justin-bits]

@bradh, oops! I just removed it. Good catch.

[schmidtk]

The outerWidth console error will still be present until #691 is merged.