Nyall Dawson fd657bee96 Fix misleading error message when an attribute form fails to
save changes

Regardless of the reason why the saving failed, a message about
invalid JSON was always shown... which is totally confusing for
users when a table has NO json fields or values (ノ`Д´)ノ
2021-02-16 09:42:19 +10:00
..
2021-02-10 13:49:28 +01:00
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2021-01-14 08:09:36 +10:00
2021-01-12 06:02:57 +10:00