MDL-40975 Theme: Remove activity padding properly when editor displayed for RTL

theme/base/style/course.css

@@ -315,7 +315,10 @@ span.editinstructions {
 .dir-rtl span.editinstructions { left: auto; right: 32px;}
 input.titleeditor { vertical-align: text-bottom; }
 .editing .course-content .section .activity.editor_displayed .activityinstance {
-    padding: initial;
+    padding-right: initial;
+}
+.dir-rtl.editing .course-content .section .activity.editor_displayed .activityinstance {
+    padding-left: initial;
 }
 
 /* Course drag and drop upload styles */

theme/bootstrapbase/less/moodle/course.less

@@ -95,7 +95,7 @@
             display: none;
         }
         div.activityinstance {
-            padding: initial;
+            padding-right: initial;
 
             input {
                 margin-bottom: initial;
@@ -114,12 +114,6 @@
             right: 100%;
         }
 
-        .editing_move {
-            /* Move the move icon to the start of the line */
-            left: auto;
-            right: 0;
-        }
-
         .mod-indent {
             /**
              * Add appropriate padding such that nothing overlaps the
@@ -137,6 +131,22 @@
     }
 }
 
+.dir-rtl.editing .section {
+    .activity {
+        .editing_move {
+            /* Move the move icon to the start of the line */
+            left: auto;
+            right: 0;
+        }
+
+        &.editor_displayed {
+            div.activityinstance {
+                padding-left: initial;
+            }
+        }
+    }
+}
+
 .activity img.activityicon {
     margin-right: 6px;
     vertical-align: text-bottom;