T20: Debug

- DebugToolbar, BreakpointList, CallStack with folded library frames, ThreadList
- VariablesPanel and WatchPanel, colored by kind, changes washed
- HexViewer at a base address with the byte under the pointer lit on both sides
- Disassembly with source lines, registers and numbers colored, gutter breakpoints
- Flamegraph that zooms by frame, TimelineProfiler that zooms and pans by wheel
- NetworkInspector with a waterfall, a filter and a request's headers and body
- icons: redo-dot, arrow-down-to-dot, arrow-up-from-dot
- gallery: the Debug page

src/primitives/icon.rs

@@ -43,11 +43,13 @@ icons! {
     AppWindow => "app-window",
     Archive => "archive",
     ArrowDownLeft => "arrow-down-left",
+    ArrowDownToDot => "arrow-down-to-dot",
     ArrowDownToLine => "arrow-down-to-line",
     ArrowDownWideNarrow => "arrow-down-wide-narrow",
     ArrowDown => "arrow-down",
     ArrowLeft => "arrow-left",
     ArrowRight => "arrow-right",
+    ArrowUpFromDot => "arrow-up-from-dot",
     ArrowUpNarrowWide => "arrow-up-narrow-wide",
     ArrowUpRight => "arrow-up-right",
     ArrowUp => "arrow-up",
@@ -211,6 +213,7 @@ icons! {
     Puzzle => "puzzle",
     Quote => "quote",
     Redo2 => "redo-2",
+    RedoDot => "redo-dot",
     RefreshCw => "refresh-cw",
     Regex => "regex",
     Reply => "reply",