Fix dashboard repolist alignment and repolisting (#17355)

Unfortunately #17301 broke the restriction of the dashboard repolist to
the user's repos because it stopped passing in the uid for the current
user. This PR restores this.

There is also a weird alignment problem - not caused by that PR - where
the menu items in the repolist spread over multiple lines. This PR
simply reduces the padding on these items and switches the justification
of the flex elements to space-evenly.

Signed-off-by: Andrew Thornton <art27@cantab.net>

Co-authored-by: techknowlogick <techknowlogick@gitea.io>

web_src/js/components/DashboardRepoList.js

@@ -362,6 +362,7 @@ export function initDashboardRepoList() {
       return {
         searchLimit: dashboardRepoListData.searchLimit || 0,
         subUrl: AppSubUrl,
+        uid: dashboardRepoListData.uid || 0,
       };
     },
   });