`index out of bounds` panic when modifying table demo column count

[landaire]

If you go to https://rerun-io.github.io/egui_table/ and modify columns to be a value at or below 12 the application will crash with the following error in the console log:

panicked at egui_table/src/table.rs:542:73:
index out of bounds: the len is 12 but the index is 12

At the time of writing that line corresponds to:

egui_table/egui_table/src/table.rs

Line 542 in 605f4ca

Rect::from_x_y_ranges(self.col_x[start]..=self.col_x[end], y_range)

I haven't had time to dive into this yet, but seeing as it's a panic in the core table code and rather than the demo I wanted to create an issue until I can look further.

[hydra]

stumbled on the same issue myself today too. It happens in the web demo and when running locally. just came here to report this issue and found your issue.