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/view_list.tmpl

@@ -1,6 +1,6 @@
 <table id="repo-files-table" class="ui fixed single line table">
 	<thead>
-		<tr>
+		<tr class="commit-list">
 			<th class="four wide">
 				{{if .LatestCommitUser}}
 					<img class="ui avatar image img-12" src="{{.LatestCommitUser.RelAvatarLink}}" />
@@ -28,6 +28,10 @@
 						{{end}}
 				</a>
 				<span class="grey has-emoji">{{RenderCommitMessage .LatestCommit.Summary .RepoLink $.Repository.ComposeMetas}}
+				{{if IsMultilineCommitMessage .LatestCommit.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 .LatestCommit.Message $.RepoLink $.Repository.ComposeMetas}}</pre>
+				{{end}}
 				{{template "repo/commit_status" .LatestCommitStatus}}</span>
 			</th>
 			<th class="nine wide">