fix: add bold titles (#204)

Signed-off-by: Henry Schreiner <[email protected]>

Author: henryiii

src/uproot_browser/tui/browser.css

@@ -58,6 +58,10 @@ Tools {
     overflow: scroll;
 }
 
+CollapsibleTitle {
+   text-style: bold;
+}
+
 Footer > .footer--highlight {
     background: $secondary-darken-2;
 }

src/uproot_browser/tui/tools.py

@@ -8,7 +8,6 @@
 
 class Tools(textual.containers.Container):
     def compose(self) -> textual.app.ComposeResult:
-        yield textual.widgets.Label("Tools")
         with textual.widgets.Collapsible(title="Theme", collapsed=False):
             themes = self.app.available_themes
             yield textual.widgets.Select([(t, t) for t in themes], allow_blank=False)
@@ -21,7 +20,6 @@ def select_changed(self, event: textual.widgets.Select.Changed) -> None:
 
 class Info(textual.containers.Container):
     def compose(self) -> textual.app.ComposeResult:
-        yield textual.widgets.Label("Info")
         with textual.widgets.Collapsible(title="uproot-browser", collapsed=False):
             yield textual.widgets.Label(f"Version: [green]{__version__}[/green]")
         with textual.widgets.Collapsible(title="Packages", collapsed=False):