Expandable commit bodies (#2980)

* Initial working state of expandable commit bodies

* Fix all commits having showing button for multiline commits

* Refactor checking multiline messages method

* Force newlines with <br> in commit body

* Show multiple lines in the list view of repositories

* Fixed proper newlines and minor refactor

Use <pre> instead of <p>, this is so we can use \n instead of having to manually place <br> into the HTML. Makes it easier to display commit bodies.

* Fix commit list messages jumping around

* Fix indentation in view_list.tmpl

* Use vertical-align: baseline instead of top

* Refactor commit button toggle function

* Remove RenderCommitBodyLink function

* Add comments

* Add newline at the end of _repository.less

* Fix long commit bodies not properly wrapping inside <pre>

* Don't split on double newlines

* Show the commit body in commit view

* Update stylesheets

* Add/fix comments and run make fmt

* Fix spaces not being tabs

templates/repo/commits_table.tmpl

@@ -30,7 +30,7 @@
 					<th class="three wide right aligned">{{.i18n.Tr "repo.commits.date"}}</th>
 				</tr>
 			</thead>
-			<tbody>
+			<tbody class="commit-list">
 				{{ $r:= List .Commits}}
 				{{range $r}}
 					<tr>
@@ -61,6 +61,10 @@
 						</td>
 						<td class="message collapsing">
 							<span class="has-emoji{{if gt .ParentCount 1}} grey text{{end}}">{{RenderCommitMessage .Summary $.RepoLink $.Repository.ComposeMetas}}</span>
+							{{if IsMultilineCommitMessage .Message}}
+							<button class="basic compact mini ui icon button commit-button"><i class="ellipsis horizontal icon"></i></button>
+							<pre class="commit-body" style="display: none;">{{RenderCommitBody .Message $.RepoLink $.Repository.ComposeMetas}}</pre>
+							{{end}}
 							{{template "repo/commit_status" .Status}}
 						</td>
 						<td class="grey text right aligned">{{TimeSince .Author.When $.Lang}}</td>