small fixes for copy to tab and copy to clipboard

Author: BRUNER Patrick

src/ColumnizerLib/Extensions/LogLineExtensions.cs

@@ -8,4 +8,9 @@ public static string ToClipBoardText (this ILogLine logLine)
     {
         return logLine == null ? string.Empty : $"\t{logLine.LineNumber + 1}\t{logLine.FullLine}";
     }
+
+    public static string ToClipBoardText (this ILogLineMemory logLine)
+    {
+        return logLine == null ? string.Empty : $"\t{logLine.LineNumber + 1}\t{logLine.FullLine}";
+    }
 }

src/LogExpert.UI/Controls/LogWindow/LogWindow.cs

@@ -5198,8 +5198,8 @@ private void CopyMarkedLinesToClipboard ()
 
             foreach (var lineNum in lineNumList)
             {
-                var line = _logFileReader.GetLogLine(lineNum);
-                if (CurrentColumnizer is ILogLineXmlColumnizer xmlColumnizer)
+                var line = _logFileReader.GetLogLineMemory(lineNum);
+                if (CurrentColumnizer is ILogLineMemoryXmlColumnizer xmlColumnizer)
                 {
                     callback.LineNum = lineNum;
                     line = xmlColumnizer.GetLineTextForClipboard(line, callback);

src/LogExpert.UI/Dialogs/LogTabWindow/LogTabWindow.cs

@@ -453,7 +453,7 @@ private void ApplyToolTips ()
     public LogWindow.LogWindow AddFilterTab (FilterPipe pipe, string title, ILogLineMemoryColumnizer preProcessColumnizer)
     {
         var logWin = AddFileTab(pipe.FileName, true, title, false, preProcessColumnizer);
-        if (pipe.FilterParams.SearchText.Length > 0)
+        if (pipe.FilterParams.SearchText?.Length > 0)
         {
             ToolTip tip = new(components);