move: do not move all file classes if only one was selected in presence of non-java file (IDEA-57353)

java/java-tests/testData/refactoring/moveClassAndFile/allClassesInFile/after/t/MyClass.java

@@ -0,0 +1,5 @@
+package t;
+
+class MyClass{}
+
+class MyOneMoreClass{}

java/java-tests/testData/refactoring/moveClassAndFile/allClassesInFile/before/s/MyClass.java

@@ -0,0 +1,3 @@
+package s;
+class MyClass{}
+class MyOneMoreClass{}