Always show share icon in file details screen

src/main/java/com/owncloud/android/ui/fragment/FileDetailFragment.java

@@ -292,9 +292,11 @@ public class FileDetailFragment extends FileFragment implements OnClickListener,
             item.setEnabled(false);
         }
 
+        item = menu.findItem(R.id.action_share_file);
+        item.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
+
         if(getFile().isSharedWithMe() && !getFile().canReshare()){
             // additional restriction for this fragment
-            item = menu.findItem(R.id.action_share_file);
             if(item != null){
                 item.setVisible(false);
                 item.setEnabled(false);

src/main/res/drawable/ic_share.xml

@@ -0,0 +1,4 @@
+<vector android:height="24dp" android:viewportHeight="24.0"
+    android:viewportWidth="24.0" android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#FFFFFF" android:pathData="M18,16.08c-0.76,0 -1.44,0.3 -1.96,0.77L8.91,12.7c0.05,-0.23 0.09,-0.46 0.09,-0.7s-0.04,-0.47 -0.09,-0.7l7.05,-4.11c0.54,0.5 1.25,0.81 2.04,0.81 1.66,0 3,-1.34 3,-3s-1.34,-3 -3,-3 -3,1.34 -3,3c0,0.24 0.04,0.47 0.09,0.7L8.04,9.81C7.5,9.31 6.79,9 6,9c-1.66,0 -3,1.34 -3,3s1.34,3 3,3c0.79,0 1.5,-0.31 2.04,-0.81l7.12,4.16c-0.05,0.21 -0.08,0.43 -0.08,0.65 0,1.61 1.31,2.92 2.92,2.92 1.61,0 2.92,-1.31 2.92,-2.92s-1.31,-2.92 -2.92,-2.92z"/>
+</vector>

src/main/res/menu/file_actions_menu.xml

@@ -27,6 +27,7 @@
         android:title="@string/action_share"
         app:showAsAction="never"
         android:showAsAction="never"
+        android:icon="@drawable/ic_share"
         android:orderInCategory="1" />
     <item
         android:id="@+id/action_open_file_with"