[FL-2844] desktop: removing slideshow file when leaving slideshow view (#1762)

* [FL-2844] desktop: removing slideshow file when leaving slideshow view; vscode: fix for BM port fetcher; fap api: more symbols for LL
* desktop: actually removing slideshow file
* desktop: moved slideshow removal to scene code; fbt: better blackmagic device handling
* fbt: disabled pagination for gdb
* vscode: restored blackmagic command line
* fbt: fixed debug_other target; added debug_other_blackmagic
* furi: added furi_thread_suspend API group; fixed null-pointer deref for thread name; cleaned up RTOS config
* furi: changed thread state check to eTaskGetState

.vscode/example/launch.json

@@ -9,6 +9,10 @@
             "type": "command",
             "command": "shellCommand.execute",
             "args": {
+                "useSingleResult": true,
+                "env": {
+                    "PATH": "${workspaceFolder};${env:PATH}"
+                },
                 "command": "./fbt get_blackmagic",
                 "description": "Get Blackmagic device",
             }