1.5-dev Tweak Tool shortcut key regression
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#### Summary:
<!-- Summarize the issue/suggestion concisely: -->
A regression in 1.5.
Tweak Tool
In version 1.4 the keys Shift + > or Shift + < would select the shrink/enlarge mode.
However in 1.5 these keys only briefly select the shrink/enlarge mode, flicking back to the original selected mode when the < or > keys are released.
#### Steps to reproduce:
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- open Inkscape
- draw an object
- select Tweak Tool
- press Shift + > or Shift + <
- see gif animation
[TweakKeyShortcut](/uploads/f2c89300601eb87136d884b1310c7bce/TweakKeyShortcut.gif){width=515 height=497}
#### What happened?
The shrink/enlarge mode was only briefly selected
Tested both Windows and Linux
#### What should have happened?
The shrink/enlarge mode should be selected as in earlier versions!
Sample attachments:
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#### Version info
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```
Inkscape 1.5-dev (d4d38f3, 2026-03-19, custom)
Compile (Run)
GLib version: 2.86.3
GTK version: 4.20.3 (4.20.3)
glibmm version: 2.86.0
gtkmm version: 4.20.0
libxml2 version: 2.15.1
libxslt version: 1.1.45
Cairo version: 1.18.4 (1.18.4)
Pango version: 1.56.4 (1.56.4)
HarfBuzz version: 12.3.0 (12.3.0)
Poppler version: 25.12.0
OS version: Windows 11 25H2
```
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issue