Init the xpc with the remote UI from the main app

- Otherwise we lose some very first UI callbacks

NeoVimXpc/NeoVimXpcImpl.h

@@ -10,8 +10,6 @@
 
 @interface NeoVimXpcImpl : NSObject <NeoVimXpc>
 
-- (instancetype)init;
-
-- (void)setNeoVimUi:(id<NeoVimUi>)ui;
+- (instancetype)initWithNeoVimUi:(id<NeoVimUi>)ui;
 
 @end

NeoVimXpc/NeoVimXpcImpl.m

@@ -265,7 +265,7 @@ void custom_ui_start(void) {
   NSThread *_neoVimThread;
 }
 
-- (instancetype)init {
+- (instancetype)initWithNeoVimUi:(id<NeoVimUi>)ui {
   self = [super init];
   if (self == nil) {
     return nil;
@@ -287,11 +287,9 @@ void custom_ui_start(void) {
   }
   [uiLaunchCondition unlock];
 
-  return self;
-}
-
-- (void)setNeoVimUi:(id <NeoVimUi>)ui {
   neoVimOsxUi = ui;
+
+  return self;
 }
 
 - (void)runNeoVim:(id)sender {

NeoVimXpc/main.m

@@ -14,17 +14,15 @@
 @implementation NVXpcDelegate
 
 - (BOOL)listener:(NSXPCListener *)listener shouldAcceptNewConnection:(NSXPCConnection *)newConnection {
-  NeoVimXpcImpl *neoVimXpc = [NeoVimXpcImpl new];
+  newConnection.remoteObjectInterface = [NSXPCInterface interfaceWithProtocol:@protocol(NeoVimUi)];
+
+  NeoVimXpcImpl *neoVimXpc = [[NeoVimXpcImpl alloc] initWithNeoVimUi:newConnection.remoteObjectProxy];
 
   newConnection.exportedInterface = [NSXPCInterface interfaceWithProtocol:@protocol(NeoVimXpc)];
   newConnection.exportedObject = neoVimXpc;
 
-  newConnection.remoteObjectInterface = [NSXPCInterface interfaceWithProtocol:@protocol(NeoVimUi)];
-
   [newConnection resume];
 
-  [neoVimXpc setNeoVimUi:newConnection.remoteObjectProxy];
-
   return YES;
 }