Fix control line edit crash when undoing history

When perspective control line editing is active and the history entry is
changed such that edit mode is automatically disabled, there is a crash.
The history change triggers a processing parameters update and disables
editing. When editing is disabled, the perspective tool also tries to
update the processing parameters, causing a double mutex lock attempt.

This commit avoids updating parameters from the perspective tool and
uses the tweak operator (introduced with the spot removal tool) to achieve
the same effect.

Closes #6251.

rtgui/toolpanelcoord.h

@@ -321,7 +321,6 @@ public:
     void autoCropRequested () override;
     void autoPerspRequested (bool corr_pitch, bool corr_yaw, double& rot, double& pitch, double& yaw, const std::vector<rtengine::ControlLine> *lines = nullptr) override;
     double autoDistorRequested () override;
-    void updateTransformPreviewRequested (rtengine::ProcEvent event, bool render_perspective) override;
 
     // spotwblistener interface
     void spotWBRequested (int size) override;