Update padding for MudPaper components across various features

Increased padding from 'pa-4' to 'pa-6' for MudPaper components in Events, MeetingSchedule, Students, and Teams features to ensure consistent styling and improved visual spacing.

WebApp/Components/Features/Teams/Assignment.razor

@@ -21,7 +21,7 @@
     </ActionButtons>
 </PageHeader>
 
-<MudPaper Elevation="2" Class="pa-4 mt-4">
+<MudPaper Elevation="2" Class="pa-6 mt-4">
     <MudGrid>
         <MudItem Style="width:160px;">
             <MudNumericField @bind-Value="_parameters.TeamSizeLimit"
@@ -117,7 +117,7 @@
     <MudButton Class="ma-3" OnClick="Solve" Variant="Variant.Filled" Color="Color.Primary" Disabled="@_isSolving">Solve</MudButton>
 </MudPaper>
 
-<MudPaper Elevation="2" Class="pa-4 mt-4">
+<MudPaper Elevation="2" Class="pa-6 mt-4">
     <MudGrid>
         <MudItem xs="12" lg="8">
             <MudText Typo="Typo.h5" Class="mb-4">Students</MudText>