Fix formatting of changes on the projector

Describe the bug
Sometimes the strikethrough and underlined formatting of change recommendations and amendments are not displayed correctly on the projector.

How to Reproduce

1. create a change recommendation or amendment with some insertions and deletions
2. project the motion with a change rec or the amendment
3. open the menu 'projector' and open the projector that shows the current motion/amendment
4. change the zoom level (Strg+ "+/-") and pay attention to the formatting of the displayed changes and if strikethrough and underlined formatting is present

I was able to reproduce this only in Firefox, not in Chromium.

Different zoom levels as examples:
90%:

120%:

Expected behavior
Formatting of changes is displayed correctly: red with strikethrough and green underlined.

Additional information
The problem also occurs in the Autopilot standard projection, which leads to confused users. (tested in FF version 152.0.2)

Start by reproducing the formatting issue in Firefox using the projector view for a motion or amendment, then check the projector and Autopilot standard projection rendering paths. Done means red strikethrough deletions and green underlined insertions remain correct when changing the zoom level, including in Firefox.