[FIX] web: show more text of short calendar event

In a4d170ad9 there were some improvment to not show event totally empty
on the day calendar view because of different style (font + padding).

The lower part of the text was still a little cut, this commit try to
improve this for week and day view mode by removing 5 additional pixels.

opw-2422700

note:

Also fix the fc-short for fullcalendar Odoo, we had this 2019 change:

fullcalendar/fullcalendar@e879c43

that made it not working without title (odoo use case), in 2020 it was
reverted when refactoring for 5.0:

fullcalendar/fullcalendar@7c7ce1e

closes odoo/odoo#66109

X-original-commit: b856d312be19b0fdf636600a76c4d9b427eedb7c
Signed-off-by: Nicolas Lempereur (nle) <nle@odoo.com>

addons/web/static/lib/fullcalendar/timegrid/main.js

@@ -267,7 +267,9 @@ Docs & License: https://fullcalendar.io/
                 }
                 // if the event is short that the title will be cut off,
                 // attach a className that condenses the title into the time area.
-                if (seg.eventRange.def.title && seg.bottom - seg.top < 30) {
+                //if (seg.eventRange.def.title && seg.bottom - seg.top < 30) {
+                // ODOO FIX: fc-short without title as done in 3.0 and 5.0
+                if (seg.bottom - seg.top < 30) {
                     seg.el.classList.add('fc-short'); // TODO: "condensed" is a better name
                 }
             }

addons/web/static/src/scss/web_calendar.scss

@@ -51,6 +51,11 @@ $o-cw-filter-avatar-size: 20px;
             font-weight: 500;
         }
 
+        // Try to show one full lien for short event
+        &.fc-short .fc-content {
+            margin-top: 1px;
+        }
+
         &.o_cw_custom_highlight {
             z-index: 10!important;
 
@@ -208,6 +213,7 @@ $o-cw-filter-avatar-size: 20px;
             // Try to avoid showing no title for short event
             &.fc-short {
                 padding-top: 0;
+                padding-bottom: 0;
             }
         }