[FIX] mail: ensure that the callView maintains the proper size

closes odoo/odoo#105260

X-original-commit: e39b2a8794840fced43793f1f45936b81c3c0c9e
Signed-off-by: Alexandre Kühn (aku) <aku@odoo.com>

addons/mail/static/src/components/call_view/call_view.scss

@@ -3,10 +3,12 @@
 // ------------------------------------------------------------------
 
 .o_CallView {
+    height: 50%; // ensures that the view returns to the right height when resized
     min-height: 50%;
     background: var(--CallView-background-color, #{$dark});
 
     &.o-isMinimized {
+        height: 20%; // ensures that the view returns to the right height when resized
         min-height: #{"max(20%, 130px)"};
     }
 }