Double clicking a filename other than `App.svelte` then clicking the editing area erases all the component

[inspiredlabs]

Steps to reproduce:

• Double clicking a Comp.svelte filename tab in the UI
• then click the editing area
• BANG, your component is gone.

import BarryScott from './BarryScott.svelte';
</script>

<BarryScott >
    Bang! And, your component is gone.
</BarryScott>

This is especially annoying when starting a new component as it's handy to double-click the filename and copy it's contents to be reused in the import statement: import Paste from './Paste.svelte'.

Other than that, top-notch first impression. 💯