Refine GDAL export dialog options section.

[lllarsen]

Summary

Adds subsections to GDAL export dialog and adds the ability it input arbitrary cutline WKT strings. Fixes output filename not updating when new datasets are selected.

Screenshots / UI Changes

i18n

• No hardcoded user-facing strings
• New or modified translation keys are documented below

i18n keys changed/added

• KEY_PATH_ONE –
• KEY_PATH_TWO –

Tests & Build

• npm run lint passes
• npm test passes (or N/A)
• npm run build succeeds

[lllarsen]

Two pieces of feedback I would like:

The output filename updating logic uses untracked in an effect to ensure that the output filename only updates when a new dataset is selected, instead of updating anytime gdal options are changed. This creates confusion of causality however, it would be much better executed with some api which triggers a function when a specific signal updates instead of as an effect, however I'm not sure if that is possible in angular.

Also, for some reason I can only update the outputFilename signal by setting it to an empty string first. No clue why that happens, would love some insight on that.