[patch]: move refresh right before loading patch content

* not in EDT;
* support changed patch file content outside project dir between dialog showing;

platform/vcs-impl/src/com/intellij/openapi/vcs/changes/patch/ApplyPatchDifferentiatedDialog.java

@@ -398,6 +398,7 @@ public class ApplyPatchDifferentiatedDialog extends DialogWrapper {
   private static PatchReader loadPatches(@NotNull VirtualFile patchFile) {
     PatchReader reader;
     try {
+      patchFile.refresh(false, false);
       reader = PatchVirtualFileReader.create(patchFile);
     }
     catch (IOException e) {

platform/vcs-impl/src/com/intellij/openapi/vcs/changes/shelf/UnshelveWithDialogAction.java

@@ -71,7 +71,6 @@ public class UnshelveWithDialogAction extends DumbAwareAction {
         VcsBalloonProblemNotifier.showOverChangesView(project, "Can not find path file", MessageType.ERROR);
         return;
       }
-      virtualFile.refresh(false, false);
       List<ShelvedBinaryFilePatch> binaryShelvedPatches =
         ContainerUtil.map(changeList.getBinaryFiles(), ShelvedBinaryFilePatch::new);
       final ApplyPatchDifferentiatedDialog dialog =