add description to feature-management setting tab. Closes #14780

modules/feature-management/src/Volo.Abp.FeatureManagement.Blazor/Components/FeatureSettingGroup/FeatureSettingManagementComponent.razor

@@ -3,6 +3,7 @@
 @if (Settings != null && Settings.HasManageHostFeaturesPermission)
 {
     <Form>
+        <Paragraph>@L["ManageHostFeaturesText"]</Paragraph>
         <Button Size="Size.Small" Color="Color.Primary" onclick="@OnManageHostFeaturesClicked">
             <Icon Name="@("fa-cog")"/> @L["ManageHostFeatures"]
         </Button>

modules/feature-management/src/Volo.Abp.FeatureManagement.Web/Pages/FeatureManagement/Components/FeatureSettingGroup/Default.cshtml

@@ -8,6 +8,7 @@
 <form id="FeatureSettingsForm">
     @if (Model.HasManageHostFeaturesPermission)
     {
+        <p>@L["ManageHostFeaturesText"]</p>
         <abp-button size="Small" button-type="Primary" id="ManageHostFeatures" icon="cog" text="@L["ManageHostFeatures"].Value"/>
     }
 </form>