refactor(ui): One QML file per screen; the HDMI boost's setup screens and backend commands removed

ui/qml/RiskList.qml

@@ -0,0 +1,17 @@
+// The BIOS update's risks.
+import QtQuick
+
+Column {
+    id: list
+    spacing: 8
+    Repeater {
+        model: ["A failed or interrupted BIOS update can leave the machine unable to start (bricked). Steamify, CachyOS and Valve take no responsibility for that.",
+                "NEVER turn off the power, unplug the machine or press the power button while it updates, including the restart(s) afterwards.",
+                "The screen can stay black for several minutes. Wait.",
+                "Only on mains power, with all other programs closed."]
+        Row { required property string modelData; spacing: 10; width: list.width
+            Rectangle { width: 6; height: 6; radius: 3; color: Theme.bad; y: 9 }
+            Text { text: parent.modelData; width: parent.width - 16; wrapMode: Text.WordWrap; color: Theme.soft
+                   font.family: Theme.body; font.pixelSize: 15; lineHeight: 1.3 } }
+    }
+}