UI improvements - optimized for small screens, drawer now works properly, disabled scrolling when modal dialog is appeared.

src/components/modal_box.rs

@@ -1,5 +1,6 @@
 use crate::locales::trl;
 use leptos::*;
+use crate::app::DialogHelper;
 use crate::validator::Validator;
 
 #[derive(Copy, Clone)]
@@ -35,10 +36,14 @@ impl DialogOpener {
     }
 
     pub fn show(&self) {
+        let dlg_helper = use_context::<DialogHelper>().expect("No dialog helper");
+        dlg_helper.set_opened(true);
         self.set_visible.update(|state| *state = true);
     }
 
     pub fn hide(&self) {
+        let dlg_helper = use_context::<DialogHelper>().expect("No dialog helper");
+        dlg_helper.set_opened(false);
         self.set_visible.update(|state| *state = false);
         self.set_empty.set("".to_string());
         self.set_not_checked.set(None);