Merge branch 'cleanup_BackendModule' into 'master'

[TASK] Remove inline styling of plugin preview

See merge request !14

Resources/Private/Partials/Backend/PluginDataTableHeader.html

 <thead>
 	<tr>
-		<th scope="col" style="width: 50%">
+		<th scope="col">
 			<f:translate key="LLL:EXT:df_tabs/Resources/Private/Language/locallang_backend.xlf:backend.plugin.preview.settings"/>
 		</th>
-		<th scope="col" style="width: 50%">
+		<th scope="col">
 			<f:translate key="LLL:EXT:df_tabs/Resources/Private/Language/locallang_backend.xlf:backend.plugin.preview.values"/>
 		</th>
 	</tr>

Resources/Private/Templates/Backend/Tabs.html

 {namespace be=TYPO3\CMS\Backend\ViewHelpers}
 {namespace core=TYPO3\CMS\Core\ViewHelpers}
 
-<style type="text/css">
-	.backend-preview-table > tbody > tr > th {
-		white-space: normal;
-	}
-</style>
+<f:asset.css identifier="df_tabs-pluginpreview" href="EXT:df_tabs/Resources/Public/StyleSheets/Backend/pluginpreview.css"></f:asset.css>
 
 <br/>
 
-<table class="table table-striped table-bordered backend-preview-table">
+<table class="table table-striped table-bordered df_tabs-backend-preview-table">
 	<f:render partial="PluginDataTableHeader"/>
 	<tbody>
 	<tr>

Resources/Public/StyleSheets/Backend/pluginpreview.css

+.df_tabs-backend-preview-table > tbody > tr > th {
+	white-space: normal;
+}
+
+.df_tabs-backend-preview-table > thead > tr > th {
+	width: 50%;
+}