improve Samba dialog. fix NoNet build

src/Kp2aBusinessLogic/Io/SmbFileStorage.cs

@@ -8,7 +8,7 @@ using SMBLibrary;
 using FileAttributes = SMBLibrary.FileAttributes;
 using KeePassLib.Utility;
 using Java.Nio.FileNio;
-
+#if !NoNet
 namespace Kp2aBusinessLogic.Io
 {
     public class SmbFileStorage : IFileStorage
@@ -613,3 +613,4 @@ namespace Kp2aBusinessLogic.Io
         }
     }
 }
+#endif

src/keepass2android-app/FileSelectHelper.cs

@@ -4,6 +4,7 @@ using System.Linq;
 using System.Net;
 #if !NoNet
 using FluentFTP;
+using static Kp2aBusinessLogic.Io.SmbFileStorage;
 #endif
 using System.Text;
 
@@ -22,7 +23,7 @@ using Keepass2android.Javafilestorage;
 #endif
 using KeePassLib.Serialization;
 using KeePassLib.Utility;
-using static Kp2aBusinessLogic.Io.SmbFileStorage;
+
 
 namespace keepass2android
 {
@@ -384,6 +385,8 @@ namespace keepass2android
                                           string fullPath = SmbConnectionInfo.FromUrlAndCredentials(url, user, password, domain).ToPath();
                                           onStartBrowse(fullPath);
                                       });
+			builder.SetCancelable(false);
+			
             EventHandler<DialogClickEventArgs> evtH = new EventHandler<DialogClickEventArgs>((sender, e) => onCancel());
 
             builder.SetNegativeButton(Android.Resource.String.Cancel, evtH);

src/keepass2android-app/Resources/layout/smbcredentials.axml

@@ -3,8 +3,12 @@
     android:orientation="vertical"
     android:layout_width="fill_parent"
     android:layout_height="wrap_content"
+    android:padding="12dp"
     android:layout_margin="12dip"
     >
+    <TextView android:layout_width="fill_parent"
+              android:layout_height="wrap_content"
+              android:text="@string/hint_smb_credentials" />
   <LinearLayout
     android:orientation="horizontal"
     android:layout_width="fill_parent"

src/keepass2android-app/Resources/values/strings.xml

@@ -734,6 +734,7 @@
   <string name="EntryChannel_name">Entry notifications</string>
   <string name="EntryChannel_desc">Notification to simplify access to the currently selected entry.</string>
   <string name="CloseDbAfterFailedAttempts">Close database after three failed biometric unlock attempts.</string>
+  <string name="hint_smb_credentials">If you want to access files from your personal Windows computer, use the computer name or local IP address as host URL; enter the computer name as domain and the Windows login (often the same as your Microsoft account) as username and password.</string>
   <string name="WarnFingerprintInvalidated">Warning! Biometric authentication can be invalidated by Android, e.g. after adding a new fingerprint in your device settings. Make sure you always know how to unlock with your master password!</string>
 
   <string-array name="ChangeLog_1_13">