Prevent decimal insertion in integer-only fields (#1868)

Added a condition to check if the value is not an integer before allowing the insertion of a decimal separator when the 'NumpadDecimal' key is pressed. This ensures that decimal points are not inserted in fields restricted to integer values, maintaining their integrity.

Co-authored-by: Christian Storb <[email protected]>

Radzen.Blazor/wwwroot/Radzen.Blazor.js

@@ -978,7 +978,7 @@ window.Radzen = {
       return;
       }
 
-      if (e.code === 'NumpadDecimal') {
+      if (e.code === 'NumpadDecimal' && !isInteger) {
           var cursorPosition = e.target.selectionEnd;
           e.target.value = [e.target.value.slice(0, e.target.selectionStart), decimalSeparator, e.target.value.slice(e.target.selectionEnd)].join('');
           e.target.selectionStart = ++cursorPosition;