feat: modify pienapple-picture with my remix

- change UI layout to make it looks like the default style of Windows image browser.
- update icons to material design icon for better looks. add lost icons for those new added button at the bottom bar.
- restore window style to normal. remove borderless style.
- delete X button at the right-top corner. disable feature that drag window to move, because all functions provided by native window are restored.
- move prev next image button to the center of bottom bar.
- move navigator view to the right-bottom corner so that it will not overlay on the shown image.
- remove all animation effect, including alpha transition, fade out when exiting and etc.
- delete function that double click windows to exit. now double clicking windows will do nothing. change default value of double click behavior to do nothing.
- change default value of stay on top to false because stay on top is not the default behavior of Windows image browser.

assets/resources.qrc

@@ -2,12 +2,13 @@
     <qresource prefix="/">
         <file>icons/zoom-in.svg</file>
         <file>icons/zoom-out.svg</file>
-        <file>icons/view-fullscreen.svg</file>
+        <file>icons/fit-in-view.svg</file>
+        <file>icons/horizontal-flip.svg</file>
         <file>icons/zoom-original.svg</file>
+        <file>icons/object-rotate-left.svg</file>
         <file>icons/object-rotate-right.svg</file>
         <file>icons/view-background-checkerboard.svg</file>
         <file>icons/app-icon.svg</file>
-        <file>icons/window-close.svg</file>
         <file>icons/go-next.svg</file>
         <file>icons/go-previous.svg</file>
         <file>plain/translators.html</file>