feat(StatusBaseInput): add keyReleased signal

This is so that we can get notified when keys on the text edit were released.
Unfortunately we don't seem to be able to attach to `Keys.onReleased` from outside
of the component.

Closes #372

src/StatusQ/Controls/StatusBaseInput.qml

@@ -52,6 +52,8 @@ Item {
         name: ""
     }
 
+    signal keyReleased()
+
     implicitWidth: 448
     implicitHeight: multiline ? Math.max(edit.implicitHeight + topPadding + bottomPadding, 44) : 44
 
@@ -162,6 +164,10 @@ Item {
                     }
                 }
 
+                Keys.onReleased: {
+                    statusBaseInput.keyReleased();
+                }
+
                 onTextChanged: {
                     statusBaseInput.dirty = true
                     if (statusBaseInput.maximumLength > 0) {