fix: unfinished wizard modifies settings

Author: vol0n

clion-plugin/src/main/kotlin/org/utbot/cpp/clion/plugin/settings/UTBotAllProjectSettings.kt

@@ -69,6 +69,6 @@ class UTBotAllProjectSettings(val project: Project) {
 }
 
 data class UTBotSettingsModel(
-    var projectSettings: UTBotProjectStoredSettings.State,
-    var globalSettings: UTBotProjectIndependentSettings.State,
+    val projectSettings: UTBotProjectStoredSettings.State,
+    val globalSettings: UTBotProjectIndependentSettings.State,
 )

clion-plugin/src/main/kotlin/org/utbot/cpp/clion/plugin/ui/wizard/UTBotWizard.kt

@@ -17,7 +17,7 @@ import java.awt.event.KeyEvent
 
 class UTBotWizard(private val project: Project) : AbstractWizard<UTBotBaseWizardStep>("UTBot: Quickstart", project) {
     // copy of settings to make changes during wizard steps
-    private val mySettingsModel = UTBotSettingsModel(project.settings.storedSettings, projectIndependentSettings)
+    private val mySettingsModel = UTBotSettingsModel(project.settings.storedSettings.copy(), projectIndependentSettings.copy())
 
     init {
         addStep(IntroStep())