Draft: Disable full docker title to reduce minimum width

Disable full docker title to reduce minimum width so that dockers can get smaller than the docker title text.

UX issues:

1. When the title text is truncated by ellipsis, there is no tooltip on mouseover to display the full title text.
2. The title text can overlap with the detach/float button.

Test Plan

• Check that dockers can get narrower than the title text.
• Check that dockers cannot get too narrow to the point it is not even visible at all.

Formalities Checklist

• I confirmed this builds.
• I confirmed Krita ran and the relevant functions work.
• n/a I tested the relevant unit tests and can confirm they are not broken. (If not possible, don't hesitate to ask for help!)
• I made sure my commits build individually and have good descriptions as per KDE guidelines.
• I made sure my code conforms to the standards set in the HACKING file.
• I can confirm the code is licensed and attributed appropriately, and that unattributed code is mine, as per KDE Licensing Policy.