MDL-64171 block_myoverview: change course summary view image size

Size reduced from 7rem to 5rem for smaller devices
and for courses without a description.

theme/boost/scss/moodle/blocks.scss

@@ -123,8 +123,8 @@ $card-gutter : $card-deck-margin * 2;
 }
 
 .summaryimage {
-    height: 7rem;
-    width: 7rem;
+    height: 5rem;
+    width: 5rem;
     background-position: center;
     background-size: cover;
 }

theme/boost/style/moodle.css

@@ -11256,8 +11256,8 @@ div.editor_atto_toolbar button .icon {
   overflow-x: scroll; }
 
 .summaryimage {
-  height: 7rem;
-  width: 7rem;
+  height: 5rem;
+  width: 5rem;
   background-position: center;
   background-size: cover; }
 

theme/bootstrapbase/less/moodle/blocks.less

@@ -455,8 +455,8 @@ body.used-region-side-pre.used-region-side-post {
 }
 
 .summaryimage {
-    height: 7rem;
-    width: 7rem;
+    height: 5rem;
+    width: 5rem;
     .border-radius(50%);
     background-position: center;
     background-size: cover;

theme/bootstrapbase/style/moodle.css

@@ -16530,8 +16530,8 @@ body {
   border-top-left-radius: 4px;
 }
 .summaryimage {
-  height: 7rem;
-  width: 7rem;
+  height: 5rem;
+  width: 5rem;
   -webkit-border-radius: 50%;
   -moz-border-radius: 50%;
   border-radius: 50%;