[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)

No file, test, or entry point is named in the issue. Start by locating the Bangle 2 backswipe-from-edge app and reviewing how its gesture conflicts with keyboards and the quick launcher; done requires an agreed blacklisting, prioritisation, or sensitivity behavior that prevents accidental triggers.

Written by the indexing model from the issue text.