[Gui][Mod]: uniform spin button step size to 5%

- as discussed here: https://github.com/FreeCAD/FreeCAD/pull/7103 we have different transparency spin button step sizes. This PR uniforms them all to 5%.

src/Mod/Mesh/Gui/ViewProvider.cpp

@@ -234,7 +234,7 @@ QIcon ViewProviderExport::getIcon() const
 
 App::PropertyFloatConstraint::Constraints ViewProviderMesh::floatRange = {1.0f, 64.0f, 1.0f};
 App::PropertyFloatConstraint::Constraints ViewProviderMesh::angleRange = {0.0f, 180.0f, 1.0f};
-App::PropertyIntegerConstraint::Constraints ViewProviderMesh::intPercent = {0, 100, 1};
+App::PropertyIntegerConstraint::Constraints ViewProviderMesh::intPercent = {0, 100, 5};
 const char* ViewProviderMesh::LightingEnums[]= {"One side", "Two side", nullptr};
 
 PROPERTY_SOURCE(MeshGui::ViewProviderMesh, Gui::ViewProviderGeometryObject)

src/Mod/Part/Gui/DlgSettingsObjectColor.ui

@@ -96,7 +96,7 @@
            <number>100</number>
           </property>
           <property name="singleStep">
-           <number>10</number>
+           <number>5</number>
           </property>
           <property name="prefEntry" stdset="0">
            <cstring>DefaultShapeTransparency</cstring>