Regular expression capturing groups don't work right with Replace All

[akrawitz]

Describe the bug If you try to use a regular expression capturing group with Replace All, every instance will use the capturing group from the first instance, instead of each instance using it's own capturing group.

To Reproduce Steps to reproduce the behavior:

1. Create a Markdown cell with the contents:

   A find
   B find
   C find
   D find
   E find

2. Click Open find pane
3. Click to open Settings
4. Click to enable Regular expression setting
5. For Find enter: ([A-Z]) find
6. Click to open Replace
7. For Replace enter: $1 replace
8. Click the Replace All button
9. The cell now contains:

   A replace
   A replace
   A replace
   A replace
   A replace

Expected behavior I expect the cell to now contain:

A replace
B replace
C replace
D replace
E replace

Desktop (please complete the following information):

• OS: Windows 10 Pro 21H2
• Browser: Chrome Version 100.0.4896.127 (Official Build) (64-bit)

Additional context Interestingly, if you click Replace Current repeatedly, instead of clicking Replace All once, then you get the expected result.