Show progress in target picker if listing takes time

src/targetPicker.ts

@@ -46,31 +46,32 @@ function _getTarget(): Target|undefined
 // Command callbacks
 export async function pickTarget()
 {
-	let targets = await listTargets();
-	let quickPickItems = targets
-		.sort((a, b) => {
-			if (a.type !== b.type) {
-				return a.type.localeCompare(b.type);
-			}
-			if (a.type === "Simulator") {
-				const simA = a as Simulator;
-				const simB = b as Simulator;
-				if (simA.state !== simB.state) {
-					return simA.state === "Booted" ? -1 : simB.state === "Booted" ? 1 : 0; 
+	let quickPickItems = listTargets().then((targets) => {
+		return targets
+			.sort((a, b) => {
+				if (a.type !== b.type) {
+					return a.type.localeCompare(b.type);
 				}
-			}
-
-			return 0;
-		})
-		.map((t): TargetQuickPickItem => ({
-			label: t.name,
-			description:
-				(t.type === "Simulator") ? 
-					(t as Simulator).state === "Booted" ? "Booted" : "" :
-					(t as Device).modelName,
-			detail: `${t.type} ‧ ${t.runtime}`,
-			target: t,
-		}));
+				if (a.type === "Simulator") {
+					const simA = a as Simulator;
+					const simB = b as Simulator;
+					if (simA.state !== simB.state) {
+						return simA.state === "Booted" ? -1 : simB.state === "Booted" ? 1 : 0; 
+					}
+				}
+
+				return 0;
+			})
+			.map((t): TargetQuickPickItem => ({
+				label: t.name,
+				description:
+					(t.type === "Simulator") ? 
+						(t as Simulator).state === "Booted" ? "Booted" : "" :
+						(t as Device).modelName,
+				detail: `${t.type} ‧ ${t.runtime}`,
+				target: t,
+			}));
+	});
 
 	let quickPickOptions: vscode.QuickPickOptions = {
 		title: "Select iOS Target",