some fixes

Graph ColorSet optimized for better look.
Y-Axis are now all shown in black.
Curve width was redused to 1.0
Added ability to select\unselect curves by Shift+LeftButton click.
Code cleanup.

WinCCFlexArchViewer/About.cs

@@ -1,7 +1,7 @@
 using System;
 using System.Diagnostics;
 using System.Windows.Forms;
-using WinCCFlexLogViewer.Properties;
+//using WinCCFlexLogViewer.Properties;
 
 namespace WinCCFlexLogViewer
 {
@@ -10,15 +10,11 @@ public partial class About : Form
 		public About()
 		{
             InitializeComponent();
-		}
-
-		//
-	/*	private void About_Load(object sender, EventArgs e)
-		{
-	//		base.Icon = Resources.logo1;
-		}   */
+            var version = System.Reflection.Assembly.GetExecutingAssembly().GetName().Version;
+            DateTime buildDate = new DateTime(2000, 1, 1).AddDays(version.Build).AddSeconds(version.Revision * 2);
+            lblBuild.Text = buildDate.ToString();
+        }
 
-		//
 		private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
 		{
             linkLabel1.LinkVisited = true;
@@ -29,5 +25,11 @@ private void button1_Click(object sender, EventArgs e)
         {
             Close();
         }
+
+        private void linkLabel2_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
+        {
+            linkLabel1.LinkVisited = true;
+            Process.Start("https://github.com/yuriqdev/WinCCflexLogViewer");
+        }
     }
 }