uses a map or set of URLs, which can be a performance hog #625
Description
reported by a sonarqube analysis, several classes & methods are affected:
org.locationtech.udig.catalog.ui.FileConnectionPage.openFileDialog(Composite)org.locationtech.udig.catalog.ui.FileConnectionPage.checkDND(FileDialog)org.locationtech.udig.catalog.ui.FileConnectionPage.listorg.locationtech.udig.catalog.memory.MemoryServiceExtensionImpl.createService(URL, Map)org.locationtech.udig.catalog.memory.MemoryServiceExtensionImpl.impl