Use rich HTML, fix avatar text, centralize style definitions (#62)

The HTML widget in makepad is mostly complete, so we can now use it
to display rich text formatting in messages.
* HTML works for almost everything (underline/strikethrough not working)
* avatars work properly now
* images work but don't shrink to fit the window properly
* caching of widget content works again
* centralized styles for text in room timeline
* Make avatar impl more canonical, and support `set_text()`
* update to latest makepad that includes our changes

Cargo.toml

@@ -19,7 +19,6 @@ metadata.makepad-auto-version = "zqpv-Yj-K7WNVK2I8h5Okhho46Q="
 [dependencies]
 makepad-widgets = { git = "https://github.com/makepad/makepad", branch = "rik" }
 
-
 anyhow = "1.0"
 chrono = "0.4"
 clap = { version = "4.0.16", features = ["derive"] }

src/app.rs

@@ -235,6 +235,7 @@ impl LiveRegister for App {
         crate::shared::clickable_view::live_design(cx);
         crate::shared::avatar::live_design(cx);
         crate::shared::text_or_image::live_design(cx);
+        crate::shared::html_or_plaintext::live_design(cx);
 
         // home - chats
         crate::home::home_screen::live_design(cx);

src/discover/discover_screen.rs

@@ -1,5 +1,4 @@
 use crate::shared::clickable_view::*;
-use makepad_widgets::widget::WidgetCache;
 use makepad_widgets::*;
 
 live_design! {