Dalson: use font-base for buttons

dalston/style-editor.css

@@ -300,7 +300,7 @@ object {
 	color: #FFFFFF;
 	font-weight: 600;
 	font-family: "Crimson Text", "Baskerville Old Face", Garamond, "Times New Roman", serif;
-	font-family: var(--font-headings, "Crimson Text", "Baskerville Old Face", Garamond, "Times New Roman", serif);
+	font-family: var(--font-base, "Crimson Text", "Baskerville Old Face", Garamond, "Times New Roman", serif);
 	font-size: 1em;
 	line-height: 1;
 	background-color: #0073AA;

dalston/style-rtl.css

@@ -1082,7 +1082,7 @@ input[type="submit"],
 	cursor: pointer;
 	font-weight: 600;
 	font-family: "Crimson Text", "Baskerville Old Face", Garamond, "Times New Roman", serif;
-	font-family: var(--font-headings, "Crimson Text", "Baskerville Old Face", Garamond, "Times New Roman", serif);
+	font-family: var(--font-base, "Crimson Text", "Baskerville Old Face", Garamond, "Times New Roman", serif);
 	font-size: 1rem;
 	background-color: #0073AA;
 	border-radius: 5px;

dalston/style.css

@@ -1082,7 +1082,7 @@ input[type="submit"],
 	cursor: pointer;
 	font-weight: 600;
 	font-family: "Crimson Text", "Baskerville Old Face", Garamond, "Times New Roman", serif;
-	font-family: var(--font-headings, "Crimson Text", "Baskerville Old Face", Garamond, "Times New Roman", serif);
+	font-family: var(--font-base, "Crimson Text", "Baskerville Old Face", Garamond, "Times New Roman", serif);
 	font-size: 1rem;
 	background-color: #0073AA;
 	border-radius: 5px;