Misc · Terms and notices: licenses, consent and a cookie banner

misc::LicenseViewer lists what a product ships with each license beside
the chosen one's text. misc::ConsentDialog asks for a box before Accept
and answers each way out once, accept or decline. misc::CookieBanner
takes Accept all, Reject all, or a switch per kind through Choose, which
turns into Save choices on its focus. ChangeLog Viewer points to
data_display::Changelog.

src/theme/misc.rs

@@ -11,6 +11,10 @@ pub struct MiscSizes {
     pub small_face: Rems,
     /// A flashcard's least height.
     pub card: Rems,
+    /// A license viewer's list, and the least width of the text beside it.
+    pub licenses: Rems,
+    /// How tall a license's text grows before it scrolls.
+    pub reading: Rems,
 }
 
 impl Theme {
@@ -19,6 +23,8 @@ impl Theme {
             face: px_to_rems(112.0),
             small_face: px_to_rems(32.0),
             card: px_to_rems(176.0),
+            licenses: px_to_rems(240.0),
+            reading: px_to_rems(320.0),
         }
     }
 }