IDE 2.0.121 VM 406

IDE
 - Add block and variable quick-search to the IDE (thanks, Sam!)

VM
 - Add support for Databot V3
 - Set PIN_LED to -1 on boards that lack a user LED
 - Support for clearing program on DUELink boards with A+B button gesture at startup
 - Fix: Don't do a taskSleep() when pinging DUELink address 82 on first use of I2C
 - Add databot v3 to extraVMs (preliminary)

Libraries
 - Wavetable Synthesis: Add set envelope block
 - KidsIOT: Add menu option to control both motors (thanks, Josep!)
 - 3dBot: Tweaks to motor control (thanks, Josep!)
 - Catalab 32: Add library for Catalab 32 (thanks, Allan!)
 - Barometric Pressure (BMX280): Don't stop the task if no BMP280 or BME280 is connected (requested by Roger)
 - Add Math library: A few useful integer math operations
 - Add Makerport Network library: For use with pre-flashed MakerPort ESP-01S WiFi module (thanks, Roger!)
 - Touch: Fix race condition that could allow multiple calls to _touch_init to leave the MPR121 in an inconsistent state

Translations
 - Updated: Portuguese (Brazil)