fix: resolve performance issue and memory leak in table example #294
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The table_upd event was causing the table example to enter into a redrawing loop whenever the row content was showing. The postEvent would trigger another postEvent and a redraw.
I removed the table_upd event completely as unnecessary, as changing the active_content_fn is enough by itself for the row content to show without needing a table update event.
I also added the missing free for users_buf, mostly to disable the memory leak warnings when exiting the program.