Prevent negative position when widget size is greater than viewport size

Related issues:
- https://github.com/uBlockOrigin/uBlock-issues/issues/2718
- https://github.com/uBlockOrigin/uBlock-issues/issues/2704

src/js/logger-ui.js

@@ -101,15 +101,15 @@ const onStartMovingWidget = (( ) => {
 
     const move = ( ) => {
         timer = undefined;
-        const l1 = Math.min(Math.max(l0 + mx1 - mx0, 0), pw - cw);
+        const l1 = Math.min(Math.max(l0 + mx1 - mx0, 0), Math.max(pw - cw, 0));
         if ( (l1+cw/2) < (pw/2) ) {
             widget.style.left = `${l1/pw*100}%`;
             widget.style.right = '';
         } else {
             widget.style.right = `${(pw-l1-cw)/pw*100}%`;
             widget.style.left = '';
         }
-        const t1 = Math.min(Math.max(t0 + my1 - my0, 0), ph - ch);
+        const t1 = Math.min(Math.max(t0 + my1 - my0, 0), Math.max(ph - ch, 0));
         widget.style.top = `${t1/ph*100}%`;
         widget.style.bottom = '';
     };