I'm aware that a user can go to Run -> Open containing folder (I've seen this thread) but I don't feel that it is sufficient and is counter-intuitive. Also, it doesn't select the file when it opens the explorer window, so in a folder of 1000+ files, I'll have to then find it manually.
In this patch, I've added an 'Open Containing Folder' menu item to the Edit menu and the tab-bar popup menu.
The feature uses SHOpenFolderAndSelectItems() so I've made it check if it exists on the platform.
This is a much-needed feature.