Fixes & memory optimizations (#540)

- Disable BlueTooth driver by default, to ensure it doesn't allocate memory
- Update BlueTooth settings app behaviour to make sure it starts/stops the devices
- Disable SPI RAM usage for ST7789 as it broke App Hub
- Reduce T-Display and T-Deck display buffers from 1/3rd to 1/10th of resolution
- Enabled dynamic buffers for MbedTLS to optimize memory
- TLS 1.3 did not work with dynamic buffers: downgrade to 1.2 for now
- WiFi is now enabled from the Boot app callback to the WiFi service, instead of the WiFi service start() function. This avoids a lockup when WiFi is started by the service while the Boot app is updating the WiFi settings.

build-tests/Libraries/SDL/cmake_uninstall.cmake

@@ -0,0 +1,18 @@
+if (NOT EXISTS "/home/ken/Projects/Tactility/build-tests/install_manifest.txt")
+    message(FATAL_ERROR "Cannot find install manifest: \"/home/ken/Projects/Tactility/build-tests/install_manifest.txt\"")
+endif(NOT EXISTS "/home/ken/Projects/Tactility/build-tests/install_manifest.txt")
+
+file(READ "/home/ken/Projects/Tactility/build-tests/install_manifest.txt" files)
+string(REGEX REPLACE "\n" ";" files "${files}")
+foreach (file ${files})
+    message(STATUS "Uninstalling \"$ENV{DESTDIR}${file}\"")
+    execute_process(
+        COMMAND /usr/bin/cmake -E remove "$ENV{DESTDIR}${file}"
+        OUTPUT_VARIABLE rm_out
+        RESULT_VARIABLE rm_retval
+    )
+    if(NOT ${rm_retval} EQUAL 0)
+        message(FATAL_ERROR "Problem when removing \"$ENV{DESTDIR}${file}\"")
+    endif (NOT ${rm_retval} EQUAL 0)
+endforeach(file)
+