Fix main activity positioning in edge-to-edge mode

Fixes: #67

Author: bobrofon

app/src/main/res/layout/activity_easy_sshfs.xml

@@ -4,6 +4,7 @@
     android:id="@+id/drawer_layout"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
+    android:fitsSystemWindows="true"
     tools:context=".EasySSHFSActivity">
 
     <!-- As the main content view, the view below consumes the entire