Fix file tree issues (#33916)

Author: kerwin612

templates/repo/view_file_tree.tmpl

@@ -1,5 +1,5 @@
-<div class="flex-text-block tw-mb-2">
-	<button class="ui compact tiny icon button"
+<div class="flex-text-block repo-button-row">
+	<button class="ui compact basic icon button"
 		data-global-click="onRepoViewFileTreeToggle" data-toggle-action="hide"
 		data-tooltip-content="{{ctx.Locale.Tr "repo.diff.hide_file_tree"}}">
 		{{svg "octicon-sidebar-expand"}}

web_src/css/markup/content.css

@@ -285,7 +285,6 @@
 .markup table {
   display: block;
   width: 100%;
-  width: max-content;
   max-width: 100%;
   overflow: auto;
 }

web_src/css/repo/home.css

@@ -55,7 +55,7 @@
 }
 
 .repo-view-container .repo-view-file-tree-container {
-  flex: 0 1 15%;
+  flex: 0 0 15%;
   min-width: 0;
   max-height: 100vh;
 }