Easyling Changelog - v389

New features:

204 feature dashboard resources with the content-type text/plain can be translated as well (due to JavaScript detector)
209 feature backend JSON content recognition runs for content type text/plain as well
205 feature workbench Workbench now filters segments to show only those that are available in the preview
207 feature backend multiple source and binary caches can be added and assigned to different proxy modes (rollout phase I)
208 feature dashboard Page Content Overrides with accented characters accepted

Fixes:

206 fix dashboard JSON-translation copy made more specific
211 fix miscellaneous multiple new tests for JavaScript content detection
214 fix backend cache-info null-checks implemented
203 fix dashboard zero credits balance no longer displays as a negative number