Font change does not apply to all selected lines in a Text shape

[dgillman]

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Describe the bug
When editing the text entered into a Text shape, it does not appear possible to apply a font change to all selected lines. Instead, the font is only applied to the first line of the selected text. The remaining lines must be individually selected to apply font changes.

To Reproduce
Steps to reproduce the behavior:

1. Drag a Text shape onto the canvas
2. Enter multiple lines of text into the Text shape
3. Select all lines of text in the Text shape
4. In the Format pane at the right, in the Text section, select "Courier New" in the font dropdown (it should be "Helvetia" by default, so this is a change of font family)

Expected behavior
All selected lines of text should now render in "Courier New" instead of "Helvetia".

Screenshots

Step 1: create Text shape

Step2: highlight all text

Step 3: select a new font

Step 4: font is only applied to line 1

draw.io version (In the Help->About menu of the draw.io editor):

• draw.io version 24.7.17

Desktop (please complete the following information):

• OS: MacOS 14.6.1
• Chrome: Version 129.0.6668.71 (Official Build) (arm64)

Additional context
Add any other context about the problem here.