feat(mail): new option to force default identity

Users can now force the default identity to always be used when replying
or forwarding a message.

SoObjects/SOGo/SOGoUser.m

@@ -1,5 +1,5 @@
 /*
-  Copyright (C) 2006-2020 Inverse inc.
+  Copyright (C) 2006-2021 Inverse inc.
 
   This file is part of SOGo.
 
@@ -884,6 +884,9 @@
   [mailAccount setObject: identities forKey: @"identities"];
   [identities release];
 
+  if ([_defaults mailForceDefaultIdentity])
+    [mailAccount setObject: [NSNumber numberWithBool: YES] forKey: @"forceDefaultIdentity"];
+
   // 6. Receipts
   if ([_defaults allowUserReceipt])
     {

SoObjects/SOGo/SOGoUserDefaults.h

@@ -1,6 +1,6 @@
 /* SOGoUserDefaults.h - this file is part of SOGo
  *
- * Copyright (C) 2011-2020 Inverse inc.
+ * Copyright (C) 2011-2021 Inverse inc.
  *
  * This file is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -185,6 +185,9 @@ extern NSString *SOGoWeekStartFirstFullWeek;
 - (void) setMailIdentities: (NSArray *) newIdentites;
 - (NSArray *) mailIdentities;
 
+- (void) setMailForceDefaultIdentity: (BOOL) newValue;
+- (BOOL) mailForceDefaultIdentity;
+
 - (void) setAuxiliaryMailAccounts: (NSArray *) newAccounts;
 - (NSArray *) auxiliaryMailAccounts;
 

SoObjects/SOGo/SOGoUserDefaults.m

@@ -1,6 +1,6 @@
 /* SOGoUserDefaults.m - this file is part of SOGo
  *
- * Copyright (C) 2009-2020 Inverse inc.
+ * Copyright (C) 2009-2021 Inverse inc.
  *
  * This file is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -768,6 +768,16 @@ NSString *SOGoWeekStartFirstFullWeek = @"FirstFullWeek";
   return [self arrayForKey: @"SOGoMailIdentities"];
 }
 
+- (void) setMailForceDefaultIdentity: (BOOL) newValue
+{
+  [self setBool: newValue forKey: @"SOGoMailForceDefaultIdentity"];
+}
+
+- (BOOL) mailForceDefaultIdentity
+{
+  return [self boolForKey: @"SOGoMailForceDefaultIdentity"];
+}
+
 - (void) setAuxiliaryMailAccounts: (NSArray *) newAccounts
 {
   [self setObject: newAccounts forKey: @"AuxiliaryMailAccounts"];