LPE locks keyboard signals
#### Summary: Whenever you create or select a BSPline path, you will not be able to control keyboard actions in the app. #### Steps to reproduce: First way - Open Inkscape - Open LPE dialog (important) - Select the Bezier Tool - Set it to BSpline Mode - Crete some path with two o three points - Press ENTER - Now the keyboard is locked How to escape - Manually Switch to Selection Tool and select another object, or - Right-click anywhere on the canvas and you're done. Second way - With the Selection Tool, just select that path - Now the keyboard is locked (yes, by just a click in that object) #### What happened? The app does not respond to keyboard signals until you escape with the help of the mouse/cursor. \- it's not just BSpline. If an object having _any_ LPE is selected with the LPE dialog open, but not visible this bug is triggered. Increasing importance. #### Version info ``` Inkscape 1.4-dev (1f50b42271, 2023-07-21) GLib version: 2.66.8 GTK version: 3.24.24 glibmm version: 2.64.2 gtkmm version: 3.24.2 libxml2 version: 2.9.10 libxslt version: 1.1.34 Cairo version: 1.16.0 Pango version: 1.46.2 HarfBuzz version: 2.7.4 OS version: Debian GNU/Linux 11 (bullseye) ```
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