Merge remote-tracking branch 'origin/master'

dde_patches/patches_for_3.6.5/patch_3.6.5_1.dde

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+window["Picture.save_picture_doc_id"].insertAdjacentHTML(
+  "beforebegin", 
+ `<details class="doc_details"><summary><span style="color:red;">Attention Mac Users</span></summary>
+     Camera-using methods: <code>Picture.show_picture</code>, 
+     <code>Picture.show_video</code>,
+     and <code>Picture.take_picture</code> depend on
+     camera permissions granted by the user.
+     Calling these methods may pop up a dialog asking
+     for permission the first time you call them
+     in a DDE session. But we've had cases where
+     such dialog boxes are obscured by other windows
+     or simply don't pop up. In the later case,
+     often the camera "picture" is blank.
+     <p></p>
+     If you use these methods on a Mac, 
+     we strongly suggest that you permit DDE to
+     have camera access by:<br/>
+     Apple menu/System Preferences/Security & Privacy/Camera
+     and check the "dde_dev_env" app. Even if it is already
+     checked, we've had a case where you must uncheck then
+     recheck for permissions to be granted. Perhaps this happens
+     the first time you use a new DDE release.
+</details>`)