Add message details menu button

Adds a "Properties" menu button in conversation, when one message
is selected, which displays details about the message:
- Type (SMS or MMS)
- Sender phone number (or receiver if it is a sent message)
- Used SIM
- Date sent at
- Date received at (if it is an incoming message)

This closes #19

app/src/main/kotlin/com/simplemobiletools/smsmessenger/adapters/ThreadAdapter.kt

@@ -33,6 +33,7 @@ import com.simplemobiletools.smsmessenger.activities.NewConversationActivity
 import com.simplemobiletools.smsmessenger.activities.SimpleActivity
 import com.simplemobiletools.smsmessenger.activities.ThreadActivity
 import com.simplemobiletools.smsmessenger.activities.VCardViewerActivity
+import com.simplemobiletools.smsmessenger.dialogs.MessageDetailsDialog
 import com.simplemobiletools.smsmessenger.dialogs.SelectTextDialog
 import com.simplemobiletools.smsmessenger.extensions.*
 import com.simplemobiletools.smsmessenger.helpers.*
@@ -82,6 +83,7 @@ class ThreadAdapter(
             findItem(R.id.cab_share).isVisible = isOneItemSelected && hasText
             findItem(R.id.cab_forward_message).isVisible = isOneItemSelected
             findItem(R.id.cab_select_text).isVisible = isOneItemSelected && hasText
+            findItem(R.id.cab_properties).isVisible = isOneItemSelected
         }
     }
 
@@ -98,6 +100,7 @@ class ThreadAdapter(
             R.id.cab_select_text -> selectText()
             R.id.cab_delete -> askConfirmDelete()
             R.id.cab_select_all -> selectAll()
+            R.id.cab_properties -> showMessageDetails()
         }
     }
 
@@ -184,6 +187,12 @@ class ThreadAdapter(
         }
     }
 
+    private fun showMessageDetails() {
+        val message = getSelectedItems().firstOrNull() as? Message ?: return
+        MessageDetailsDialog(activity, message)
+    }
+
+
     private fun askConfirmDelete() {
         val itemsCnt = selectedKeys.size