[Minor] Decrease headers font size

interface/index.html

@@ -241,10 +241,10 @@
 						<h5>Scan suspected message</h5>
 					</div>
 					<div class="widget-content">
-						<h5>Message source:</h5>
 						<div class="row">
 							<form class="col-lg-12" id="scanForm">
 								<div class="form-group">
+									<label for="scanMsgSource">Message source:</label>
 									<textarea class="form-control" id="scanMsgSource" rows="10" placeholder="Paste raw message source"></textarea>
 								</div>
 								<div class="form-group">
@@ -264,7 +264,7 @@
 						<div class="row">
 							<div class="col-lg-6">
 								<div class="card bg-light card-body mb-3 card bg-faded p-2 mb-3">
-									<h5>Learn Bayessian classifier:</h5>
+									<p>Learn Bayessian classifier:</p>
 									<form class="form-inline">
 										<div class="form-group">
 											<div class="btn-group">
@@ -277,7 +277,7 @@
 							</div>
 							<div class="col-lg-6">
 								<div class="card bg-light card-body mb-3 card bg-faded p-2 mb-3">
-									<h5>Learn Fuzzy storage:</h5>
+									<p>Learn Fuzzy storage:</p>
 									<form class="form-inline">
 										<div class="form-group">
 											<label for="fuzzyFlagText">Flag:</label>