Hi , I found solution for this case. Here is it:
In MainForm in UniFormCreate via UniSession.AddJS(....) I send this to browser. It just change CSS height property;
Values 63.00px and 31.50px is calculated as:
42*need_Height_factor (in my case 1.5) = 63px and
21 * need_Height_factor (in my case 1.5) = 31.5px
need_Height_factor could be any number 2,2.5... it depens form theme in my case uni_win10
$("<style type='text/css'> .x-calendar-days .x-calendar-days-time{height: 63.00px;} </style>").appendTo("head");
$("<style type='text/css'> .x-calendar-days .x-calendar-days-marker{height:63.00px;} </style>").appendTo("head");
$("<style type='text/css'> .x-calendar-days .x-calendar-days-marker-alt{height:31.50px;} </style>").appendTo("head");
$("<style type='text/css'> .x-calendar-days .x-calendar-days-marker-alt{height:31.50px;} </style>").appendTo("head");
rounded event rect could be done with
$("<style type='text/css'> .x-calendar-event{border-radius:5px;} </style>").appendTo("head");
Here is the result