multi-decrypt: working context menu

OpenKeychain/src/main/res/layout/decrypt_list_entry.xml

@@ -223,6 +223,7 @@
                     android:layout_width="36dip"
                     android:layout_height="48dip"
                     android:clickable="true"
+                    android:background="?android:selectableItemBackground"
                     android:src="@drawable/abc_ic_menu_moreoverflow_mtrl_alpha" />
 
             </LinearLayout>

OpenKeychain/src/main/res/menu/decrypt_item_context_menu.xml

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <item
+        android:id="@+id/view_log"
+        android:title="@string/view_log"
+        android:icon="@drawable/ic_view_list_grey_24dp"
+        />
+
+    <item
+        android:id="@+id/decrypt_save"
+        android:title="@string/btn_save"
+        android:icon="@drawable/ic_action_encrypt_file_24dp"
+        />
+
+    <item
+        android:id="@+id/decrypt_delete"
+        android:title="@string/btn_delete_original"
+        android:icon="@drawable/ic_delete_grey_24dp"
+        />
+
+</menu>

OpenKeychain/src/main/res/values/strings.xml

@@ -1308,5 +1308,6 @@
     <string name="error_nfc">"NFC Error: %s"</string>
     <string name="error_pin_nodefault">Default PIN was rejected!</string>
     <string name="error_bluetooth_file">Error creating temporary file. Bluetooth sharing will fail.</string>
+    <string name="btn_delete_original">Delete original file</string>
 
 </resources>