[FIX] report: missing mt/mb definition

/!\ This commit must not be forward-ported on saas-10 (the file that
is modified here does not exist anymore anyway).

Since the website/web_editor split, the mt/mb definitions were not
included in reports anymore. Those were not the only rules that
were forgotten.
As it would be tricky to add the whole files where those rules are
defined now in the assets of stables branches, this commit only
restores the missing css rules by adding them in the report.css file.

Note: after the assets refactoring that has been done in saas-10, this
problem will no longer appear.

addons/report/static/src/css/report.css

@@ -25,3 +25,76 @@ body {
     display: none;
 }
 
+/* Missing css rules since the website/web_editor split */
+.mt128 {
+    margin-top: 128px!important;
+}
+.mt92 {
+    margin-top: 92px!important;
+}
+.mt64 {
+    margin-top: 64px!important;
+}
+.mt48 {
+    margin-top: 48px!important;
+}
+.mt32 {
+    margin-top: 32px!important;
+}
+.mt16 {
+    margin-top: 16px!important;
+}
+.mt8 {
+    margin-top: 8px!important;
+}
+.mt4 {
+    margin-top: 4px!important;
+}
+.mt0 {
+    margin-top: 0px!important;
+}
+.mb128 {
+    margin-bottom: 128px!important;
+}
+.mb92 {
+    margin-bottom: 92px!important;
+}
+.mb64 {
+    margin-bottom: 64px!important;
+}
+.mb48 {
+    margin-bottom: 48px!important;
+}
+.mb32 {
+    margin-bottom: 32px!important;
+}
+.mb16 {
+    margin-bottom: 16px!important;
+}
+.mb8 {
+    margin-bottom: 8px!important;
+}
+.mb4 {
+    margin-bottom: 4px!important;
+}
+.mb0 {
+    margin-bottom: 0px!important;
+}
+.ml8 {
+    margin-left: 8px!important;
+}
+.ml4 {
+    margin-left: 4px!important;
+}
+.ml0 {
+    margin-left: 0px!important;
+}
+.mr8 {
+    margin-right: 8px!important;
+}
+.mr4 {
+    margin-right: 4px!important;
+}
+.mr0 {
+    margin-right: 0px!important;
+}