[cursorDisplay col] Hard crash when cursor on cell of SheetsSheet cursorDisplay

[frosencrantz]

Small description Hard crash when the cursor goes to the cell of SheetsSheet cursorDisplay for the current SheetsSheet.

Expected result No crash.

Actual result with screenshot

Goes into infinite recursion:

```
Current thread (most recent call first):
  File "/data/data/com.termux/files/home/git/visidata/env/lib/python3.9/site-packages/visidata/column.py", line 470 in <lambda>
  File "/data/data/com.termux/files/home/git/visidata/env/lib/python3.9/site-packages/visidata/column.py", line 244 in calcValue
  File "/data/data/com.termux/files/home/git/visidata/env/lib/python3.9/site-packages/visidata/column.py", line 282 in getValue
  File "/data/data/com.termux/files/home/git/visidata/env/lib/python3.9/site-packages/visidata/wrappers.py", line 108 in wrapply
  File "/data/data/com.termux/files/home/git/visidata/env/lib/python3.9/site-packages/visidata/column.py", line 301 in getCell
  File "/data/data/com.termux/files/home/git/visidata/env/lib/python3.9/site-packages/visidata/column.py", line 362 in getDisplayValue
  File "/data/data/com.termux/files/home/git/visidata/env/lib/python3.9/site-packages/visidata/sheets.py", line 445 in cursorDisplay
  File "/data/data/com.termux/files/home/git/visidata/env/lib/python3.9/site-packages/visidata/column.py", line 425 in getattrdeep
  File "/data/data/com.termux/files/home/git/visidata/env/lib/python3.9/site-packages/visidata/column.py", line 470 in <lambda>


...  many duplicated lines removed.

  File "/data/data/com.termux/files/home/git/visidata/env/lib/python3.9/site-packages/visidata/column.py", line 282 in getValue
  File "/data/data/com.termux/files/home/git/visidata/env/lib/python3.9/site-packages/visidata/wrappers.py", line 108 in wrapply
  ...
Aborted (core dumped)
```

Steps to reproduce with sample data and a .vd

vd 
S                  - Go to SheetsSheet
c cursorDisplay    - Go to CursorDisplay column for the current SheetsSheet

Additional context Please include the version of VisiData. Latest develop version.

[anjakefala]

Thanks @frosencrantz! Nice catch. Amusingly this was related to the fix for this: https://github.com/saulpw/visidata/issues/991

I just checked, and now both issues are handled. Will be in the next VisiData release.

[cwarden]

I'm still able to reproduce this bug as of dd54728dddb861a2e1b0a6fc7b1c549672d31089.

[frosencrantz]

I'll add it works for me from the latest develop branch

[anjakefala]

This bug has not come up again for over a year, and I have not been able to reproduce what @cwarden saw, so I think I am going to close this. If anyone runs into it again, please re-open!