Top toolbar doesn't fit the frame in case of two ketcher instanses

[AlexeyGirin]

Highlighted by @vanoprenko

Steps to Reproduce

1. Go to environment with several Ketcher instances on same page (f.e. https://rc.test.lifescience.opensource.epam.com/KetcherDemoSA/duo.html)

Actual behavior
Top toolbar doesn't fit the frame (look at Zoom combobox (100%))

Expected behavior
Top toolbar fits the frame (look at Zoom combobox (100%))

Ketcher version [e.g. v2.4.2].
v3.3.0-rc.3

[MarinaKisacik]

Reproducible.

Tested in Environment:

• Ketcher Version 3.17.0-rc.1 Build at 2026-06-02; 21:27:10
• Indigo Version 1.45.0-rc.2.0-g168fb85f2-wasm32-wasm-clang-23.0.0
• Chrome Version 149.0.7827.156 (Official Build) (64-bit)
• Win11