Refactoring: move special visualisations into multiple files

src/UI/Popup/ImportButtons/WayImportButtonViz.ts

@@ -21,6 +21,8 @@ import FullNodeDatabaseSource from "../../../Logic/FeatureSource/TiledFeatureSou
 export default class WayImportButtonViz implements AutoAction, SpecialVisualization {
     public readonly funcName: string = "import_way_button"
     needsUrls = []
+    group = "data_import"
+
     public readonly docs: string =
         "This button will copy the data from an external dataset into OpenStreetMap, copying the geometry and adding it as a 'line'" +
         ImportFlowUtils.documentationGeneral