Fix tabs not closing on double-click when the active tab is a PuTTY connection.

CHANGELOG.TXT

@@ -9,6 +9,7 @@
   Fixed issue MR-342 - Incorrect view in config pane of new connection after viewing default inheritance
   Added detection of newer versions of connection files and database schemata. mRemoteNG will now refuse to open them to avoid data loss.
   Improved appearance and discoverability of the connection search box.
+  Fixed tabs not closing on double-click when the active tab is a PuTTY connection.
 
   Fixed issue MR-340 - Object reference not set to an instance of an object.
   Fixed issue MR-344 - Move "Always show panel tabs" option

mRemoteV1/UI/UI.Window.Connection.vb

@@ -385,6 +385,7 @@ Namespace UI
             End Sub
 
             Private Sub TabController_DoubleClickTab(ByVal sender As Crownwood.Magic.Controls.TabControl, ByVal page As Crownwood.Magic.Controls.TabPage) Handles TabController.DoubleClickTab
+                _lastMouseUp = 0
                 If My.Settings.DoubleClickOnTabClosesIt Then
                     Me.CloseConnectionTab()
                 End If
@@ -844,6 +845,7 @@ Namespace UI
                 RefreshIC()
             End Sub
 
+            Private _lastMouseUp As Integer = 0
             Private Sub TabController_MouseUp(ByVal sender As Object, ByVal e As MouseEventArgs) Handles TabController.MouseUp
                 Debug.Print("TabController_MouseUp()")
                 Debug.Print("_ignoreChangeSelectedTabClick = {0}", _ignoreChangeSelectedTabClick)
@@ -859,7 +861,14 @@ Namespace UI
 
                     Select Case e.Button
                         Case MouseButtons.Left
-                            FocusIC()
+                            Dim currentTicks As Integer = Environment.TickCount
+                            Dim elapsedTicks As Integer = currentTicks - _lastMouseUp
+                            If elapsedTicks > SystemInformation.DoubleClickTime Then
+                                _lastMouseUp = currentTicks
+                                FocusIC()
+                            Else
+                                TabController.OnDoubleClickTab(TabController.SelectedTab)
+                            End If
                         Case MouseButtons.Middle
                             CloseConnectionTab()
                         Case MouseButtons.Right