Attribute Spreadsheet panel: make it possible to view long names!

Currently the Attribute Spreadsheet view scales column widths to the digits, which means column titles get cropped.

Here, for example, I can't tell which attribute is which in the spreadsheet!

Would be interested to hear what people think is the best solution [will update proposal if you want to add stuff!).

My suggestion would be one of the following:

1. Tool tip with full attribute name when you hover over the column (easy to implement, hard to read)
2. Expand individual columns to fully fit the name if necessary (easy to read, could look a little wonky though?)
3. Allow "zooming" (really, expanding the column widths) with the same CTRL + SCROLL shortcut that also works in the text editor and some other UI panels
4. Some other thing I haven't thought of?

I was going to suggest "allow manual resizing of individual columns" but actually the columns can appear or disappear depending on what node you're viewing, so I think it becomes pretty inconvenient/confusing if you do it that way.

What do you think?