Fallback for infinite load failures, and minor fixes.

1/ Fallback for infinite load failures
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In case infinite load fail, we remove the loading gif, an show an error message.
We must not set `loading = true`, or multiple loads will occurs (and multiple error messages be added)

2/ Ending message when the end of a list is reached
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To ensure user is warned.

3/ Bug fix - Some articles aren't rendered
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With infinite load, the first article is never shown.