Long document names without whitespace can overflow new TEI Document header UI

[blms]

testing notes

On the latest dev build, 1.3.0-dev.4

• Create a TEI document with a long name, like over 255 characters, with no whitespace
• Click on the document, and the title in the header should be truncated to a reasonable character limit, with ellipsis
• You should be able to hover the truncated title to see the full title

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