Refactoring: add more types to special visualisations arguments

src/UI/Popup/PlantNetDetectionViz.ts

@@ -31,6 +31,7 @@ export class PlantNetDetectionViz extends SpecialVisualizationSvelte {
     args = [
         {
             name: "image_key",
+            type:"key",
             defaultValue: AllImageProviders.defaultKeys.join(","),
             doc: "The keys given to the images, e.g. if <span class='literal-code'>image</span> is given, the first picture URL will be added as <span class='literal-code'>image</span>, the second as <span class='literal-code'>image:0</span>, the third as <span class='literal-code'>image:1</span>, etc... Multiple values are allowed if ';'-separated ",
         },