MDL-65411 core_calendar: wrap long description text

theme/boost/scss/moodle/calendar.scss

@@ -429,6 +429,7 @@ table.calendartable caption {
 
 .summary-modal-container {
     .description-content {
+        overflow-wrap: break-word;
         > p {
             margin: 0;
         }

theme/boost/style/moodle.css

@@ -11633,8 +11633,10 @@ table.calendartable caption {
 .day-popover-content:empty + .day-popover-alternate {
   display: block; }
 
-.summary-modal-container .description-content > p {
-  margin: 0; }
+.summary-modal-container .description-content {
+  overflow-wrap: break-word; }
+  .summary-modal-container .description-content > p {
+    margin: 0; }
 
 .summary-modal-container .location-content {
   overflow-wrap: break-word; }

theme/bootstrapbase/less/moodle/calendar.less

@@ -417,6 +417,7 @@
 
 .summary-modal-container {
     .description-content {
+        overflow-wrap: break-word;
         > p {
             margin: 0;
         }

theme/bootstrapbase/style/moodle.css

@@ -5964,6 +5964,9 @@ img.iconsmall {
 .calendarwrapper {
   position: relative;
 }
+.summary-modal-container .description-content {
+  overflow-wrap: break-word;
+}
 .summary-modal-container .description-content > p {
   margin: 0;
 }