fix(user-config): Validate device, keymap, and macro names (#543)

* fix(user-config): Validate device, keymap, and macro names

* fix device name renaming

packages/uhk-web/src/app/util/index.ts

@@ -1 +1,2 @@
 export * from './html-helper';
+export * from './validators';

packages/uhk-web/src/app/util/validators.ts

@@ -0,0 +1,3 @@
+export function isValidName(name: string): boolean {
+    return name && name.trim().length > 0;
+}