fix height of charts

fixes bug introduced in #175

Author: lovasoa

sqlpage/templates/chart.handlebars

@@ -3,12 +3,13 @@
     class="card my-2 {{class}}" 
     data-pre-init="chart" 
     data-js="/{{static_path 'apexcharts.js'}}"
+    style="height: {{default height 250}}px;"
 >
     <div class="card-body">
         <div class="d-flex">
             <h3 class="card-title">{{title}}</h3>
         </div>
-        <div class="chart" style="height: {{default height 250}}px;">
+        <div class="chart">
             <div class="d-flex justify-content-center h-100 align-items-center">
                 <div class="spinner-border" role="status" style="width: 3rem; height: 3rem;">
                     <span class="visually-hidden">Loading...</span>