fix: some modules crashing due to recent gtk refactor

Fixes a crash introduced by commit bea442e where the `await_sync` function incorrectly tried to use the current tokio runtime, which it is often outside, instead of the singleton.

Fixes #382

src/main.rs

@@ -370,5 +370,5 @@ where
 ///
 /// TODO: remove all instances of this once async trait funcs are stable
 pub fn await_sync<F: Future>(f: F) -> F::Output {
-    block_in_place(|| Handle::current().block_on(f))
+    block_in_place(|| Ironbar::runtime().block_on(f))
 }