fix paddings of buttons and other widgets

lib/enter_food_widget.dart

@@ -36,6 +36,9 @@ class _EnterFoodWidgetState extends State<EnterFoodWidget> {
         controller: kcalPerMassController);
 
     var enterButton = ElevatedButton(
+        style: ElevatedButton.styleFrom(
+          padding: EdgeInsets.zero,
+        ),
         onPressed: () {
           double massAsNumber = 0.0;
           double kcalPerMassAsNumber = 0.0;
@@ -81,12 +84,15 @@ class _EnterFoodWidgetState extends State<EnterFoodWidget> {
         },
         child: const Icon(Icons.add));
 
-    return RowWidgetWithSpacers(
+    return Padding(
+      padding: const EdgeInsets.only(left: 8.0, right: 4.0),
+      child: RowWidget(
         nameWidget,
         massWidget,
         kcalPerMassWidget,
         null,
         enterButton,
+      ),
     );
   }
 }

lib/food_entry_widget.dart

@@ -12,16 +12,20 @@ class FoodEntryWidget extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return Card(
-      child: RowWidgetWithSpacers(
+      child: Padding(
+        padding: const EdgeInsets.only(left: 4.0),
+        child: RowWidget(
           Text(entry.name),
           Text(entry.mass.toString()),
           Text(entry.kcalPerMass.toString()),
           Text((entry.mass * entry.kcalPerMass / 100).toString()),
-        ElevatedButton(
+          IconButton(
+              style: IconButton.styleFrom(padding: EdgeInsets.zero),
               onPressed: () {
                 onDelete(context);
               },
-            child: const Icon(Icons.delete_forever_rounded)),
+              icon: const Icon(Icons.delete_forever_rounded)),
+        ),
       ),
     );
   }

lib/perdate_widget.dart

@@ -27,7 +27,7 @@ class PerDateWidget extends StatelessWidget {
               itemBuilder: (BuildContext itemBuilderContext, int index) {
                 if (index == state.foodEntries.length) {
                   return Padding(
-                    padding: const EdgeInsets.symmetric(vertical: 15),
+                    padding: const EdgeInsets.symmetric(vertical: 10),
                     child: SumWidget(limit: state.kcalLimit),
                   );
                 }

lib/row_with_spacers_widget.dart

@@ -1,63 +1,32 @@
 import 'package:flutter/material.dart';
 
-class RowWidgetWithSpacers extends StatefulWidget {
+class RowWidget extends StatefulWidget {
   final Widget? widget1;
   final Widget? widget2;
   final Widget? widget3;
   final Widget? widget4;
   final Widget? widget5;
 
-  const RowWidgetWithSpacers(
+  const RowWidget(
       this.widget1, this.widget2, this.widget3, this.widget4, this.widget5,
       {super.key});
 
   @override
-  State<RowWidgetWithSpacers> createState() => _RowWidgetWithSpacersState();
+  State<RowWidget> createState() => _RowWidgetState();
 }
 
-class _RowWidgetWithSpacersState extends State<RowWidgetWithSpacers> {
+class _RowWidgetState extends State<RowWidget> {
   @override
   Widget build(BuildContext context) {
-    return Padding(
-      padding: const EdgeInsets.symmetric(vertical: 4.0),
-      child: Row(
-        mainAxisAlignment: MainAxisAlignment.end,
+    return Row(
+      mainAxisAlignment: MainAxisAlignment.spaceBetween,
       children: [
-          Expanded(
-              flex: 5,
-              child: Padding(
-                padding: const EdgeInsets.only(
-                  left: 8.0,
-                  right: 2.0,
-                ),
-                child: widget.widget1 ?? Container(),
-              )),
-          Expanded(
-              flex: 5,
-              child: Padding(
-                padding: const EdgeInsets.symmetric(horizontal: 2.0),
-                child: widget.widget2 ?? Container(),
-              )),
-          Expanded(
-              flex: 5,
-              child: Padding(
-                padding: const EdgeInsets.symmetric(horizontal: 2.0),
-                child: widget.widget3 ?? Container(),
-              )),
-          Expanded(
-              flex: 5,
-              child: Padding(
-                padding: const EdgeInsets.symmetric(horizontal: 2.0),
-                child: widget.widget4 ?? Container(),
-              )),
-          Expanded(
-              flex: 2,
-              child: Padding(
-                padding: const EdgeInsets.symmetric(horizontal: 2.0),
-                child: widget.widget5 ?? Container(),
-              )),
+        Expanded(flex: 10, child: widget.widget1 ?? Container()),
+        Expanded(flex: 6, child: widget.widget2 ?? Container()),
+        Expanded(flex: 6, child: widget.widget3 ?? Container()),
+        Expanded(flex: 8, child: widget.widget4 ?? Container()),
+        Expanded(flex: 3, child: widget.widget5 ?? Container()),
       ],
-      ),
     );
   }
 }

lib/sum_widget.dart

@@ -17,7 +17,7 @@ class SumWidget extends StatelessWidget {
           sum += entry.kcalPerMass / 100 * entry.mass;
         }
 
-        return RowWidgetWithSpacers(
+        return RowWidget(
           null,
           null,
           const Text("kcal heute:"),