Add form validation to KontoTable and KreditorTable components. Disable save button when form is invalid. Clean up console logs in TextHeaderWithFilter and dataUtils.

client/src/components/headers/TextHeaderWithFilter.js

@@ -290,14 +290,11 @@ export default class TextHeaderWithFilter {
     this.eGui.style.height = '100%';
     this.eGui.style.display = 'flex';
     this.eGui.style.flexDirection = 'column';
-    
-    console.log('TextHeaderWithFilter constructor');
   }
 
   init(params) {
     this.params = params;
-    console.log('TextHeaderWithFilter init params:', params);
-    
+
     // Listen for menu close events to keep state in sync
     if (params.api) {
       params.api.addEventListener('popupMenuVisibleChanged', (event) => {
@@ -312,7 +309,6 @@ export default class TextHeaderWithFilter {
   }
 
   getGui() {
-    console.log('TextHeaderWithFilter getGui called');
     return this.eGui;
   }