style: reformat C/C++ sources and headers with clang-format

Run clang-format over all project C/C++ source and header files
(.c, .cpp, .cc, .h, .hpp, .hh, .m, .mm) under app/ and tests/.
Non-source files (svg, qm, qrc, etc.) were not touched.

tests/gtest/codec_exportformat_test.cpp

@@ -12,7 +12,8 @@ TEST(CodecExportFormat, NamesAndExtensions)
 			  QStringLiteral("mxf"));
 	EXPECT_EQ(ExportFormat::GetName(ExportFormat::kFormatCount),
 			  QStringLiteral("Unknown"));
-	EXPECT_TRUE(ExportFormat::GetExtension(ExportFormat::kFormatCount).isEmpty());
+	EXPECT_TRUE(
+		ExportFormat::GetExtension(ExportFormat::kFormatCount).isEmpty());
 }
 
 TEST(CodecExportFormat, AllFormatsHaveNames)