Emulator should check if ROM exists about vuengine-studio HOT 3 OPEN

I'm not sure what "loading the emulator widget" entails. I see the widget at the right side of the window all the time. At the moment, when I hit the Play button, if there is no ROM, the building process start, which is the expected behavior.

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I am referring to the widget that is the actual emulator itself. Not the sidebar widget. Here's an example for a scenario that is currently not optimally handled:

• You start the game via the run command (or use VES to play any other Virtual Boy ROM file)
• You quit VES
• You delete the ROM you previously loaded in VES, for example if you tested a random ROM and remove it after the test
• You start VES again
• It will load the previously opened tabs, including the one holding the emulator for the deleted ROM
• No ROM can be found and an empty string is fed to the emulator, whose window just stays black

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I would simply close the tab. When I open a ROM, I don't think of it as a file, but as a running game; and a running game is an ephemeral thing. Not only that, I would close the emulator's tab even if the ROM exists because the it uses quite a bit of CPU and having it running automatically in a tab that may not be visible if I had tons of others before closing VES, it would be wasting resources until I launch the emulator again or find about it running already.

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