[Backswipe from edge] No blacklisting/prioritisation

### Affected hardware version Bangle 2 ### Your firmware version 2v29 ### The bug ### Describe the bug Currently the backswipe from edge app is quite sensitive, triggering from fairly small swipe gestures. So this will, almost guaranteed, trigger on apps that have swipe behaviour themselves, such as keyboards or the quick launcher. ### Expected behaviour Ideally, this should have a blacklisting, or allow some form of supersedable swipe functionality. Otherwise reducing the senstivity, or providing the option to, so you perform a longer swipe, would reduce the likelihood of triggering this by accident. ### Installed apps cprassist (0.02), files (0.08), widbt (0.09), qmsched (0.10), wid_edit (0.05), oxofocus (0.02), notifyfs (0.12), dragboard (0.10), about (0.15), widalarm (0.02), themesetter (0.05), 2047pp (0.04), diceroll (0.02), a_dndtoggle (0.02), acmaze (0.05), rebbleagenda (0.02), autoreset (0.02), fontext (0.03), reply (0.03), widmessages (0.07), mylocation (0.11), drained (0.08), torch (0.11), dtlaunch (0.28), quicklaunch (0.16), lightswitch (0.11), score (0.04), fileman (0.04), alarm (0.52), gpstime (0.05), compass (0.09), agpsdata (0.06), widgps (0.09), ptlaunch (0.16), poweroff (0.06), imc (0.01), powermanager (0.13), weather (0.31), trex (0.05), snaky (0.01), dvdbounce (0.01), blackjack (0.03), longpressbuzz (0.01), jwalk (0.01), clockinfolist (0.01), sched (0.36), setting (0.82), phoneremind (0.01), widsmartbatt (0.02), smartbatt (0.04), icons (0.03), multitimer (0.12), loadanim (0.02), messages (0.70), schedclock (0.02), android (0.46), dailycolorclk (0.02), messageicons (0.17), boot (0.69), modclock (0.06), messagesoverlay (0.12), clock_info (0.27), exactwords (0.2), popconlaunch (0.05)