Repository avatars (#6986)

* Repository avatars

- first variant of code from old work for gogs
- add migration 87
- add new option in app.ini
- add en-US locale string
- add new class in repository.less

* Add changed index.css, remove unused template name

* Update en-us doc about configuration options

* Add comments to new functions, add new option to docker app.ini

* Add comment for lint

* Remove variable, not needed

* Fix formatting

* Update swagger api template

* Check if avatar exists

* Fix avatar link/path checks

* Typo

* TEXT column can't have a default value

* Fixes:

- remove old avatar file on upload
- use ID in name of avatar file - users may upload same files
- add simple tests

* Fix fmt check

* Generate PNG instead of "static" GIF

* More informative comment

* Fix error message

* Update avatar upload checks:

- add file size check
- add new option
- update config docs
- add new string to en-us locale

* Fixes:

- use FileHEader field for check file size
- add new test - upload big image

* Fix formatting

* Update comments

* Update log message

* Removed wrong style - not needed

* Use Sync2 to migrate

* Update repos list view

- bigger avatar
- fix html blocks alignment

* A little adjust avatar size

* Use small icons for explore/repo list

* Use new cool avatar preparation func by @lafriks

* Missing changes for new function

* Remove unused import, move imports

* Missed new option definition in app.ini

Add file size check in user/profile avatar upload

* Use smaller field length for Avatar

* Use session to update repo DB data, update DeleteAvatar - use session too

* Fix err variable definition

* As suggested @lafriks - return as soon as possible, code readability

templates/explore/repo_list.tmpl

@@ -2,6 +2,7 @@
 	{{range .Repos}}
 		<div class="item">
 			<div class="ui header">
+				<img class="ui avatar image" src="{{.RelAvatarLink}}">
 				<a class="name" href="{{.Link}}">
 					{{if or $.PageIsExplore $.PageIsProfileStarList }}{{if .Owner}}{{.Owner.Name}} / {{end}}{{end}}{{.Name}}
 					{{if .IsArchived}}<i class="archive icon archived-icon"></i>{{end}}
@@ -14,7 +15,7 @@
 					<span><i class="octicon octicon-repo-clone"></i></span>
 				{{else if .Owner}}
 					{{if .Owner.Visibility.IsPrivate}}
-			          <span class="text gold"><i class="octicon octicon-lock"></i></span>
+					<span class="text gold"><i class="octicon octicon-lock"></i></span>
 					{{end}}
 				{{end}}
 				<div class="ui right metas">
@@ -22,15 +23,17 @@
 					<span class="text grey"><i class="octicon octicon-git-branch"></i> {{.NumForks}}</span>
 				</div>
 			</div>
-			{{if .DescriptionHTML}}<p class="has-emoji">{{.DescriptionHTML}}</p>{{end}}
-			{{if .Topics }}
-				<div class="ui tags">
-				{{range .Topics}}
-					{{if ne . "" }}<a href="{{AppSubUrl}}/explore/repos?q={{.}}&topic=1"><div class="ui small label topic">{{.}}</div></a>{{end}}
+			<div class="description">
+				{{if .DescriptionHTML}}<p class="has-emoji">{{.DescriptionHTML}}</p>{{end}}
+				{{if .Topics }}
+					<div class="ui tags">
+					{{range .Topics}}
+						{{if ne . "" }}<a href="{{AppSubUrl}}/explore/repos?q={{.}}&topic=1"><div class="ui small label topic">{{.}}</div></a>{{end}}
+					{{end}}
+					</div>
 				{{end}}
-				</div>
-			{{end}}
-			<p class="time">{{$.i18n.Tr "org.repo_updated"}} {{TimeSinceUnix .UpdatedUnix $.i18n.Lang}}</p>
+				<p class="time">{{$.i18n.Tr "org.repo_updated"}} {{TimeSinceUnix .UpdatedUnix $.i18n.Lang}}</p>
+			</div>
 		</div>
 	{{else}}
 	<div>