Fix identify running Aseprite processes correctly to recover crashed …

…sessions (related to aseprite#4130)

Prior to this fix, Aseprite was hiding some sessions to recover,
resulting in additional support for users.
To display available recovery sessions, Aseprite only checked if
the session belonged to any running process on the OS via the
'pid' number.

src/app/crash/session.cpp

@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2019-2023  Igara Studio S.A.
+// Copyright (C) 2019-2024  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -127,10 +127,8 @@ const Session::Backups& Session::backups()
 bool Session::isRunning()
 {
   loadPid();
-  if (m_pid)
-    return base::is_process_running(m_pid);
-  else
-    return false;
+  return base::get_process_name(m_pid) ==
+    base::get_process_name(base::get_current_process_id());
 }
 
 bool Session::isCrashedSession()