Update views/report/grid to remove hack for ExtJS 6.0.1 and to remove pMathJax.

views/report/grid.html

@@ -83,24 +83,6 @@
         nColumns = columns.length,
         i, grid;
 
-    // backward compatibility
-    // Ext JS 4.2.1 the width of the column is defined using the property flex
-    // Ext JS 6.0.1 this cause crash of the grid when a hidden column is activated
-    // The workaround is to destroy the flex property and to use the
-    // columnWidth instead. the latter is a percentage ranging from 0 to 1.
-    //
-    for (i = 0; i < nColumns; i += 1) {
-        column = columns[i];
-        if (column.flex !== undefined && column.columnWidth === undefined) {
-            if (column.flex <= 1) {
-                column.columnWidth = column.flex * 0.1;
-            } else {
-                column.columnWidth = 1;
-            }
-        }
-        delete column.flex;
-    }
-
     // convert renderer / summaryRenderer properties
     // typicaly a string to a function
     //
@@ -117,9 +99,17 @@
     }
 
     // instantiate the grid
+
+    // NOTE ExtJS 6.2.0
+    // With ExtJS 6.2.0, the configuration is not working:
     //
+    //      plugins: ['pGridExport', 'pMathJax']
+    //
+    // It is related to layout and pMathJax !
+    // Remove pMathJax since its use is marginal in that application.
+
     cfgGrid = Ext.apply(cfgGrid, {
-        plugins: ['pGridExport', 'pMathJax'],
+        plugins: ['pGridExport'],
         store: cfgStore,
         forceFit: true,
         padding: "10 40 20 30",