Unified Font Browser changes font size preemptively when typing

Summary:

The Unified Font Browser changes font size preemptively when typing the font size. Try selecting the text in the font size dropdown/entry box and enter "14". The resulting font size is 41.

Steps to reproduce:

• open Inkscape
• type some text
• open the Text and Font dialog (Unified Font Browser)
• select all text in the font size entry
• type "14"

What happened?

The font size is now 41 instead of 14.

What should have happened?

The font size should only change on unfocus or on pressing Enter.

Version info

Inkscape 1.5-dev (d15180887b, 2025-03-23, custom)

                      Compile  (Run)
    GLib version:     2.84.0
    GTK version:      4.18.2 (4.18.2)
    glibmm version:   2.84.0
    gtkmm version:    4.16.0
    libxml2 version:  2.13.6
    libxslt version:  1.1.43
    Cairo version:    1.18.4 (1.18.4)
    Pango version:    1.56.3 (1.56.3)
    HarfBuzz version: 10.4.0 (10.4.0)
    Poppler version:  25.03.0

    OS version:       Slackware 15.0 x86_64 (post 15.0 -current)