Fix dialog borders

app/src/main/java/com/android/colorpicker/ColorPickerDialog.java

@@ -16,19 +16,19 @@
 
 package com.android.colorpicker;
 
-import org.isoron.uhabits.R;
-
 import android.app.Activity;
-import android.app.AlertDialog;
 import android.app.Dialog;
 import android.app.DialogFragment;
 import android.os.Bundle;
+import android.support.v7.app.AlertDialog;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.widget.ProgressBar;
 
 import com.android.colorpicker.ColorPickerSwatch.OnColorSelectedListener;
 
+import org.isoron.uhabits.R;
+
 /**
  * A dialog which takes in as input an array of palette and creates a palette allowing the user to
  * select a specific color swatch, which invokes a listener.

app/src/main/java/org/isoron/uhabits/dialogs/WeekdayPickerDialog.java

@@ -19,14 +19,14 @@
 
 package org.isoron.uhabits.dialogs;
 
-import android.app.AlertDialog;
 import android.app.Dialog;
 import android.app.DialogFragment;
 import android.content.DialogInterface;
 import android.os.Bundle;
+import android.support.v7.app.AlertDialog;
 
-import org.isoron.uhabits.helpers.DateHelper;
 import org.isoron.uhabits.R;
+import org.isoron.uhabits.helpers.DateHelper;
 
 public class WeekdayPickerDialog extends DialogFragment
         implements DialogInterface.OnMultiChoiceClickListener, DialogInterface.OnClickListener