minor style consistency fixes

views/address.pug

@@ -88,7 +88,7 @@ block content
 
 					div.card.shadow-sm.mb-3
 						div.card-body
-							h3.h6 Summary
+							h3.h6.mb-0 Summary
 								if (config.addressApi)
 									small.text-muted.border-dotted.ml-2(title=`Some details for this address were queried from ${config.addressApi}` data-toggle="tooltip") Trust Note
 							hr

views/mempool-summary.pug

@@ -19,7 +19,7 @@ block content
 	div(id="main-content", style="display: none;")
 		div.card.shadow-sm.mb-3
 			div.card-body.px-2.px-md-3
-				h3.h6 Summary
+				h3.h6.mb-0 Summary
 				hr
 
 				table.table.details-table.mb-0
@@ -45,7 +45,7 @@ block content
 
 		div.card.shadow-sm.mb-3
 			div.card-body.px-2.px-md-3
-				h3.h6 Transactions by fee rate
+				h3.h6.mb-0 Transactions by fee rate
 				hr
 
 				canvas.mb-4(id="mempoolBarChart", height="100")
@@ -69,14 +69,14 @@ block content
 
 		div.card.shadow-sm.mb-3
 			div.card-body.px-2.px-md-3
-				h3.h6 Transactions by size
+				h3.h6.mb-0 Transactions by size
 				hr
 
 				canvas.mb-4(id="txSizesBarChart", height="100")
 
 		div.card.shadow-sm.mb-3
 			div.card-body.px-2.px-md-3
-				h3.h6 Transactions by age
+				h3.h6.mb-0 Transactions by age
 				hr
 
 				canvas.mb-4(id="txAgesBarChart", height="100")

views/node-status.pug

@@ -31,7 +31,7 @@ block content
 			div.tab-pane.active(id="tab-details", role="tabpanel")
 				div.card.shadow-sm.mb-3
 					div.card-body.px-2.px-sm-3
-						h3.h6 Summary
+						h3.h6.mb-0 Summary
 						hr
 
 						table(class="table details-table mb-0")
@@ -114,7 +114,7 @@ block content
 
 				div.card.shadow-sm.mb-3
 					div.card-body.px-2.px-sm-3
-						h3.h6 Network Info
+						h3.h6.mb-0 Network Info
 						hr
 							
 						table.table.details-table.mb-0