fix: right-button double click no longer wipes rotation mid-drag (v1.7.2)

Two rotate drags started quickly at nearly the same spot were treated as a
double click: the reset was detected on button down against the previous down
time/position, so it wiped all effects and ignored the second drag, leaving
Ctrl+S to save an unrotated crop.

- Double click is now only counted for actual clicks (movement <= 4px) and is
  decided on button up; a drag breaks the chain.
- Pointer up is matched by pointer id, so a left-drag pan never counts as a click.
- dist: 1.7.2 .deb replaces the tracked 1.7.1 package.

.gitignore

@@ -49,7 +49,7 @@ app.*.map.json
 *.deb
 *.tar.gz
 *.exe
-!dist/imajviewer_1.7.1_amd64.deb
+!dist/imajviewer_1.7.2_amd64.deb
 !dist/imajviewer_setup_1.1.0.exe
 deb/usr/lib/imajviewer/
 release/