better styling for tagsinput in ACP and added it to general -> keywords

public/less/admin/settings.less

@@ -16,4 +16,20 @@
 	[data-action="upload"][type="text"] {
 		width: 95%;
 	}
+
+	.bootstrap-tagsinput {
+		width: 100%;
+		border: 0;
+		box-shadow: none;
+		padding-left: 0;
+
+		input {
+			width: 100%;
+			margin-left: 1px;
+			margin-top: 9px;
+			border-bottom: 1px dotted #ccc !important;
+			padding-bottom: 5px;
+			padding-left: 0;
+		}
+	}
 }

src/views/admin/settings/general.tpl

@@ -31,8 +31,8 @@
 			<label>[[admin/settings/general:description]]</label>
 			<input type="text" class="form-control" placeholder="[[admin/settings/general:description.placeholder]]" data-field="description" /><br />
 
-			<label>[[admin/settings/general:keywords]]</label>
-			<input type="text" class="form-control" placeholder="[[admin/settings/general:keywords-placeholder]]" data-field="keywords" /><br />
+			<label>[[admin/settings/general:keywords]]</label><br />
+			<input type="text" class="form-control" placeholder="[[admin/settings/general:keywords-placeholder]]" data-field="keywords" data-field-type="tagsinput" /><br />
 		</form>
 	</div>
 </div>