Moved the add and import buttons of the settings dialogs into their footer (#1060)

Co-authored-by: Thorsten Sommer <SommerEngineering@users.noreply.github.com>

app/MindWork AI Studio/Dialogs/Settings/SettingsDialogDataSources.razor

@@ -1,6 +1,6 @@
 @inherits SettingsDialogBase
 
-<MudDialog>
+<MudDialog ContentClass="dialog-content-aligned" ActionsClass="dialog-actions-aligned">
     <TitleContent>
         <PreviewBeta/>
         <MudText Typo="Typo.h6" Class="d-flex align-center">
@@ -12,6 +12,9 @@
         <DataSourceManagement/>
     </DialogContent>
     <DialogActions>
+        @* In the footer, adding and importing stay in reach however long the table grows: *@
+        <DataSourceAddButtons/>
+        <MudSpacer/>
         <MudButton OnClick="@this.Close" Variant="Variant.Filled">
             @T("Close")
         </MudButton>