Switching between repos when file is selected breaks UI

[juliendonck]

FileSource.svelte:100 Uncaught (in promise) TypeError: Cannot read property 'split' of null
    at create_fragment$2l (FileSource.svelte:100)
    at init (index.mjs:1447)
    at new FileSource (FileSource.svelte:98)
    at Array.create_if_block$B (Source.svelte:125)
    at Array.create_default_slot$1w (Source.svelte:111)
    at create_slot (index.mjs:58)
    at Array.create_else_block$4 (Remote.svelte:34)
    at Array.create_if_block_2$5 (Remote.svelte:34)
    at create_fragment$1n (Remote.svelte:39)
    at init (index.mjs:1447)