Long main view titles grow the header instead of being truncated

[Flaurite]

Description

The main view header renders the current view's page title with no length constraint: a long title wraps onto several lines and grows the header, pushing content down. It shows up wherever a view sets a long dynamic title.

Steps to reproduce

1. Make very long view name
2. Open a view

Actual behavior

Expected behavior

By default the title should keep the header at a stable height and truncate visually (ellipsis or a bounded number of lines) instead of growing it.