Revise function for checking "same file"

src/base/utils/fs.cpp

@@ -162,15 +162,23 @@ qint64 Utils::Fs::computePathSize(const Path &path)
 
 /**
  * Makes deep comparison of two files to make sure they are identical.
+ * The point is about the file contents. If the files do not exist then
+ * the paths refers to nothing and therefore we cannot say the files are same
+ * (because there are no files!)
  */
 bool Utils::Fs::sameFiles(const Path &path1, const Path &path2)
 {
     QFile f1 {path1.data()};
     QFile f2 {path2.data()};
-    if (!f1.exists() || !f2.exists()) return false;
-    if (f1.size() != f2.size()) return false;
-    if (!f1.open(QIODevice::ReadOnly)) return false;
-    if (!f2.open(QIODevice::ReadOnly)) return false;
+
+    if (!f1.exists() || !f2.exists())
+        return false;
+    if (path1 == path2)
+        return true;
+    if (f1.size() != f2.size())
+        return false;
+    if (!f1.open(QIODevice::ReadOnly) || !f2.open(QIODevice::ReadOnly))
+        return false;
 
     const int readSize = 1024 * 1024;  // 1 MiB
     while (!f1.atEnd() && !f2.atEnd())