Minor dashboard tweaks, fix flex-list margins (#26829)

Some small dashboard tweaks:

- Remove margin-bottom from divider so first item does not appear to
have un-equal margins
- Restore previous icon color
- Add slight margin-right to icon

Before:
<img width="783" alt="Screenshot 2023-08-31 at 00 10 28"
src="b75f70d7-8704-4afb-866d-fea0484c52d4">

After:
<img width="783" alt="Screenshot 2023-08-31 at 00 10 08"
src="50ed0c47-6f7c-449e-a054-13091369d43f">

---------

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

templates/package/shared/list.tmpl

@@ -12,8 +12,9 @@
 		<button class="ui primary button">{{.locale.Tr "explore.search"}}</button>
 	</div>
 </form>
-<div class="{{if .PackageDescriptors}}flex-list{{end}} gt-pt-4">
+<div>
 	{{range .PackageDescriptors}}
+	<div class="flex-list">
 		<div class="flex-item">
 			<div class="flex-item-main">
 				<div class="flex-item-title">
@@ -34,6 +35,7 @@
 				</div>
 			</div>
 		</div>
+	</div>
 	{{else}}
 		{{if not .HasPackages}}
 			<div class="empty center">
@@ -46,7 +48,7 @@
 				<p>{{.locale.Tr "packages.empty.documentation" "https://docs.gitea.com/usage/packages/overview/" | Safe}}</p>
 			</div>
 		{{else}}
-			<p>{{.locale.Tr "packages.filter.no_result"}}</p>
+			<p class="gt-py-4">{{.locale.Tr "packages.filter.no_result"}}</p>
 		{{end}}
 	{{end}}
 	{{template "base/paginate" .}}

templates/package/shared/versionlist.tmpl

@@ -18,8 +18,9 @@
 		<button class="ui primary button">{{.locale.Tr "explore.search"}}</button>
 	</div>
 </form>
-<div class="{{if .PackageDescriptors}}flex-list{{end}} gt-pt-4">
+<div>
 	{{range .PackageDescriptors}}
+	<div class="flex-list">
 		<div class="flex-item">
 			<div class="flex-item-main">
 				<a class="flex-item-title" href="{{.FullWebLink}}">{{.Version.LowerVersion}}</a>
@@ -28,8 +29,9 @@
 				</div>
 			</div>
 		</div>
+	</div>
 	{{else}}
-		<p>{{.locale.Tr "packages.filter.no_result"}}</p>
+		<p class="gt-py-4">{{.locale.Tr "packages.filter.no_result"}}</p>
 	{{end}}
 	{{template "base/paginate" .}}
 </div>