Widget usability feedback

[amunger]

Some feedback from linked issue:

Agree with @DRKV333 . I have switched to Data Wrangler for a while, it is really hard to use for inspecting matrix with following pain point:

1. Can't select index for multi-dimensional array!!! I have to write the code my self to down scale a N-D matrix to a 2-D matrix in order to get a better view of it!!!
2. The layout is bad, column width is too large, while I have a large matrix with many columns, it is hard to scroll to the column I want.
3. Can't freeze index!!! For example I have a 100x100 matrix, I want to check the value for column 70, and I can't see the row number!

Originally posted by @kierdwyn in #15486