* open cell inspect in code mode for JSON panels
* increase opacity of TableCellActions background for legibility in overlap cases
* fix nested grid width calculation
* fix 'jumping' on hover overflow
* route transparency through (needs a scenes update)
* base row hover color on transparency
* update the colors for table
* remove console.log
* reinstate header toggle for nested row transformation
* fix#59474 - graceful handling when subtable has no rows
* fix i18n
* use TABLE.LINE_HEIGHT
* change nestedData back to const
* TableNG: wrapped header text option
* reorganize variable names and code for easier reuse
* refine height math
* move empty string check to after null check
* add tests for useHeaderHeight
* maybe a bit faster
* cleanup to avoid creating fns and objects all the time, some tests
* fix unit test
* cell was using panel height
* add borders between header cells to make resizing more obvious
* fix tests
* changes from mob review
* jk
---------
Co-authored-by: Leon Sorokin <leeoniya@gmail.com>