store locale + theme in profile, add theme switch

src/app/ui/profilefields/profilefields.component.ts

@@ -32,11 +32,11 @@ export class ProfileFieldsComponent implements OnInit {
 
   update() {
     if(this.username) {
-      this.profileService.getAllForUser(this.username).subscribe((data: any) => {
+      this.profileService.getForUser(this.username).subscribe((data: any) => {
         this.profileFields = data.profileFields;
       })
     } else {
-      this.profileService.getAll().subscribe((data: any) => {
+      this.profileService.get().subscribe((data: any) => {
         this.profileFields = data;
       })
     }