Fix hostnames being added allowing uppercase

app/src/main/java/chat/rocket/android/RocketChatCache.java

@@ -41,7 +41,7 @@ public class RocketChatCache {
   }
 
   public void setSelectedServerHostname(String hostname) {
-    setString(KEY_SELECTED_SERVER_HOSTNAME, hostname);
+    setString(KEY_SELECTED_SERVER_HOSTNAME, hostname.toLowerCase());
   }
 
   public void addHostname(@NonNull String hostname, @Nullable String hostnameAvatarUri) {

app/src/main/java/chat/rocket/android/activity/MainActivity.java

@@ -290,7 +290,6 @@ public class MainActivity extends AbstractAuthedActivity implements MainContract
           FrescoHelper.INSTANCE.loadImage(serverButton, serverLogoUrl, placeholder);
 
           serverListContainer.addView(serverRow, serverCount - 1);
-          serverListContainer.requestLayout();
         }
       }
     }

app/src/main/java/chat/rocket/android/fragment/add_server/InputHostnameFragment.java

@@ -72,7 +72,7 @@ public class InputHostnameFragment extends AbstractFragment implements InputHost
   private String getHostname() {
     final TextView editor = (TextView) rootView.findViewById(R.id.editor_hostname);
 
-    return TextUtils.or(TextUtils.or(editor.getText(), editor.getHint()), "").toString();
+    return TextUtils.or(TextUtils.or(editor.getText(), editor.getHint()), "").toString().toLowerCase();
   }
 
   private void showError(String errString) {