Fix crash in BalancesFragment.

- The crash was happening in a very weird scenario, but it was good because it forced us to search an alternative to update the BalancesFragment when the user navigates back to the HomeFragment. The solution was to use the childFragmentManager instead of the fragmentManager to create the PagerAdapter used in the ViewPager that displays the BalancesFragment. Basically, because we are using nested fragments we need to use the childFragmentManager instead of just the fragmentManager, to use the correct LyfeCycle events.

app/src/main/java/cy/agorise/bitsybitshareswallet/fragments/BalancesFragment.kt

@@ -43,12 +43,4 @@ class BalancesFragment: Fragment() {
             balancesAdapter.replaceAll(balancesDetails)
         })
     }
-
-    override fun setUserVisibleHint(isVisibleToUser: Boolean) {
-        super.setUserVisibleHint(isVisibleToUser)
-        if (isVisibleToUser) {
-            // TODO find a better way to recreate the fragment, that does it only when the theme has been changed
-            fragmentManager?.beginTransaction()?.detach(this)?.attach(this)?.commit()
-        }
-    }
 }

app/src/main/java/cy/agorise/bitsybitshareswallet/fragments/HomeFragment.kt

@@ -112,7 +112,7 @@ class HomeFragment : Fragment() {
         }
 
         // Configure ViewPager with PagerAdapter and TabLayout to display the Balances/NetWorth section
-        val pagerAdapter = PagerAdapter(fragmentManager!!)
+        val pagerAdapter = PagerAdapter(childFragmentManager)
         viewPager.adapter = pagerAdapter
         tabLayout.setupWithViewPager(viewPager)
         // Set the pie chart icon for the third tab

app/src/main/java/cy/agorise/bitsybitshareswallet/fragments/NetWorthFragment.kt

@@ -17,12 +17,4 @@ class NetWorthFragment: Fragment() {
 
         return inflater.inflate(R.layout.fragment_net_worth, container, false)
     }
-
-    override fun setUserVisibleHint(isVisibleToUser: Boolean) {
-        super.setUserVisibleHint(isVisibleToUser)
-        if (isVisibleToUser) {
-            // TODO find a better way to recreate the fragment, that does it only when the theme has been changed
-            fragmentManager?.beginTransaction()?.detach(this)?.attach(this)?.commit()
-        }
-    }
 }