Match Class Names Against Existing Chart Labels

[SpamMusubi153]

Currently, when a chart is updated, the new data is iteratively inserted into the chart.

If a new file is uploaded with a different number of classes or classes in a different order, this data will likely be written under the first classes in the table, rather then the actual classes they belong under.

Instead, these classes should be matched with their existing chart label, or the chart should be regenerated from scratch.