adding scroll behaviour to presentation mode

src/styles/styles.less

@@ -33,6 +33,10 @@ h1, h2, h3, h4 {
   margin: 0 0 20px 0;
 }
 
+.mat-form-field {
+  width: 100%;
+}
+
 .mat-form-field .mat-form-field-infix {
   width: unset;
 }