Commits on Jan 12, 2022

1. Fixes issue MacDownApp#1104 (Rendering pane flashing) …

   For issue MacDownApp#747, a change was introduced that uses private API to disable
   caching on the preview pane's web view. This was ostensibly to make it
   so that if images referenced in the markdown document are changed on
   disk, their changes are reflected in the preview pane.
   
   Unfortunately, perhaps due to some underlying changes to WebKit/WebView,
   disabling caching will also disable caching for all sorts of other
   things like stylesheets and the base html document loaded from disk.
   This results in a momentary flash of empty content if one is typing
   quickly.
   
   Reverting the changes for MacDownApp#747 resolves the flashing issue, but does
   regress the issue regarding images being persistently cached.
   
   However, the flashing issue appears to be bothering more people than the
   image issue, so I believe it would be appropriate to temporarily regress
   the image caching bug to resolve the flashing bug. Supposedly, a plan
   exists to migrate to WKWebView, which would hopefully resolve both of
   these issues simultaneously.

   

   buzzert committed Jan 12, 2022
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