cleanup rapid js base form error handling

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Localisation updates from http://translatewiki.net.

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Localisation updates from http://translatewiki.net.

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Localisation updates from http://translatewiki.net.

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Localisation updates from http://translatewiki.net.

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Localisation updates from http://translatewiki.net.

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Localisation updates from http://translatewiki.net.

Change-Id: Ia2f3c9bda40b9e1d516b87648fc885d1458c458b
i18n: fix double-space

* cannot
* backwards compatibility

Change-Id: I457e89cdd5f5b9fcb0f305e07ea18a4ee5dd7f7a
Localisation updates from https://translatewiki.net.

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Localisation updates from https://translatewiki.net.

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Localisation updates from https://translatewiki.net.

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Localisation updates from https://translatewiki.net.

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Localisation updates from https://translatewiki.net.

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Localisation updates from https://translatewiki.net.

Change-Id: If9ca44f0ccb66f878640b128eef11baf18e26480
Localisation updates from https://translatewiki.net.

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