Fix potential crash on bad clipboard item mime type - #64
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A user might have an item copied to their clipboard that isn't necessarily an image. The current code always assumes that a text would exist if the copied item wasn't an image, but that's not always the case. This would lead to a crash due to the app calling
toString()to a null value (clipboardItem.text).This fixes that and also makes sure that the copied text isn't empty (or filled with whitespaces) before attempting to paste anything.