add explicit dimensions to navbar avatar (#9986)

* add explicit dimensions to navbar avatar

this prevents a temporary layout change when navigating between
pages with cache disabled.

* also add dimensions on frontpage

Co-authored-by: Lauris BH <lauris@nix.lv>

templates/base/head_navbar.tmpl

@@ -78,7 +78,7 @@
 
 			<div class="ui dropdown jump item poping up" tabindex="-1" data-content="{{.i18n.Tr "user_profile_and_more"}}" data-variation="tiny inverted">
 				<span class="text">
-					<img class="ui tiny avatar image" src="{{.SignedUser.RelAvatarLink}}">
+					<img class="ui tiny avatar image" width="24" height="24" src="{{.SignedUser.RelAvatarLink}}">
 					<span class="sr-only">{{.i18n.Tr "user_profile_and_more"}}</span>
 					<span class="mobile-only">{{.SignedUser.Name}}</span>
 					<i class="fitted octicon octicon-triangle-down not-mobile" tabindex="-1"></i>

templates/user/dashboard/navbar.tmpl

@@ -3,7 +3,7 @@
 		<div class="item">
 			<div class="ui floating dropdown link jump">
 				<span class="text">
-					<img class="ui avatar image" src="{{.ContextUser.RelAvatarLink}}" title="{{.ContextUser.Name}}">
+					<img class="ui avatar image" src="{{.ContextUser.RelAvatarLink}}" title="{{.ContextUser.Name}}" width="28" height="28">
 					{{.ContextUser.ShortName 20}}
 					<i class="dropdown icon"></i>
 				</span>
@@ -13,12 +13,12 @@
 					</div>
 					<div class="scrolling menu items">
 						<a class="{{if eq .ContextUser.ID .SignedUser.ID}}active selected{{end}} item" href="{{AppSubUrl}}/{{if .PageIsIssues}}issues{{else if .PageIsPulls}}pulls{{else if .PageIsMilestonesDashboard}}milestones{{end}}">
-							<img class="ui avatar image" src="{{.SignedUser.RelAvatarLink}}">
+							<img class="ui avatar image" src="{{.SignedUser.RelAvatarLink}}" width="28" height="28">
 							{{.SignedUser.Name}}
 						</a>
 						{{range .Orgs}}
 							<a class="{{if eq $.ContextUser.ID .ID}}active selected{{end}} item" title="{{.Name}}" href="{{AppSubUrl}}/org/{{.Name}}/{{if $.PageIsIssues}}issues{{else if $.PageIsPulls}}pulls{{else if $.PageIsMilestonesDashboard}}milestones{{else}}dashboard{{end}}">
-								<img class="ui avatar image" src="{{.RelAvatarLink}}">
+								<img class="ui avatar image" src="{{.RelAvatarLink}}" width="28" height="28">
 								{{.ShortName 20}}
 							</a>
 						{{end}}