Add Security+ 2.0 TX App (#3217)

* Add U64 BoundSetting
* Add secplus-tx
* Add secplus license
* Update icon
* UI update
* Add filesystem::path BoundSetting
* Add file UI
* Rename file
* Add save button
* Fix warnings, add integer conversions to UI macros
* UI update
* Copilot suggestions, name edit UI
* Fix buffer length
* Style update
* Avoid recursion in Widget::style()
* Apply suggestions from code review
* Move secplustx.cpp to external
* Shorten title
* Space optimizations, remove FilePath setting
* Remove assertions
* Change namespace
* Change title to match

firmware/common/ui_widget.cpp

@@ -206,7 +206,11 @@ void Widget::set_style(const Style* new_style) {
 }
 
 const Style& Widget::style() const {
-    return style_ ? *style_ : parent()->style();
+    for (const Widget* curr = this; curr; curr = curr->parent()) {
+        if (curr->style_) return *curr->style_;
+    }
+    // default style should always be set by SystemView
+    return *style_;
 }
 
 void Widget::drawn(bool v) {