[#361] Improve search result page (#375)

* [#361] added back button

* [#361] greatly improved looks of results

* [#361] added popup on click

* [#361] removed classnames with \!important replaced with style in component

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Co-authored-by: Camille Moussu <cmoussu@linagora.com>

src/features/Calendars/CalendarSlice.ts

@@ -684,7 +684,7 @@ const CalendarSlice = createSlice({
         action.payload.event;
       state.list[action.payload.calendarUid].events[
         action.payload.event.uid
-      ].URL = `dav/calendars/${action.payload.calendarUid}/${
+      ].URL = `/calendars/${action.payload.calendarUid}/${
         action.payload.event.uid.split("/")[0]
       }.isc`;
     },