backend/accounts: bring back watchonly account immediately if unhidden

In manage accounts in the edit button, one can hide and account. The
account is hidden immediately, but the dialog remains open, so the
user can unhide it. This commit changes the backend to bring back the
account immediately in this case.

backend/accounts.go

@@ -493,6 +493,7 @@ func copyBool(b *bool) *bool {
 // AccountSetWatch sets the account's persisted watch flag to `watch`. Set to `true` if the account
 // should be loaded even if its keystore is not connected.
 // If `watch` is set to `false`, the account is unloaded and the frontend notified.
+// If `watch` is set to `true`, the account is loaded (if the global watchonly flag is enabled) and the frontend notified.
 func (backend *Backend) AccountSetWatch(filter func(*config.Account) bool, watch *bool) error {
 	err := backend.config.ModifyAccountsConfig(func(accountsConfig *config.AccountsConfig) error {
 		for _, acct := range accountsConfig.Accounts {
@@ -524,10 +525,8 @@ func (backend *Backend) AccountSetWatch(filter func(*config.Account) bool, watch
 		}
 	}
 
-	if watch == nil || !*watch {
-		backend.initAccounts(false)
-		backend.emitAccountsStatusChanged()
-	}
+	backend.initAccounts(false)
+	backend.emitAccountsStatusChanged()
 	return nil
 }