Enable forward button on 4th screen

!175 added a new check to enable forward button that broke
4th screen after !147 was merged. This check enables the 4th
button that has special handling.

Signed-off-by: Aayush Gupta <aayushgupta219@gmail.com>

app/src/main/java/com/aurora/store/view/ui/onboarding/OnboardingActivity.kt

@@ -139,6 +139,7 @@ class OnboardingActivity : BaseActivity() {
         B.btnForward.isEnabled = lastPosition != 4
         if (lastPosition == 4) {
             B.btnForward.text = getString(R.string.action_finish)
+            B.btnForward.isEnabled = true
             B.btnForward.setOnClickListener {
                 save(PREFERENCE_INTRO, true)
                 open(SplashActivity::class.java, true)
@@ -207,4 +208,4 @@ class OnboardingActivity : BaseActivity() {
             return 5
         }
     }
-}
+}