fix(MON)Graphs streched in IE

Css properties added to fix an issue with Internet Explorer 11, in Montoring->Perfomance, the second graph added was many times wider than the first one.

ref: MON-2052 #5081 #5683

www/Themes/Centreon-2/style.css

@@ -2142,16 +2142,22 @@ textarea.default-textarea {
 
 /* -- Views Performance page -- */
 .graph-options {
-  display: flex;
-  justify-content: flex-end;
-  margin-bottom: 2px;
+    display: -webkit-flex;
+    display: flex;
+    -webkit-justify-content: flex-end;
+    justify-content: flex-end;
+    margin-bottom: 2px;
 }
 
 .graphZone {
   margin-bottom: 40px;
+  display: -webkit-flex;
   display: flex;
-  flex-direction: row;
+  -webkit-flex-direction: column;
+  flex-direction: column;
+  -webkit-flex-wrap: wrap;
   flex-wrap: wrap;
+  -webkit-justify-content: space-between;
   justify-content: space-between;
 }