fixed issue with temp plot resetting time scale

[nitin710]

Description

• fixed issue with temp plot resetting time scale
  • Previously, the change made to plot time window by pressing arrow keys was lost when EmotiBit was disconnected.

Requirements

• None

Issues Referenced

• Fixes EmotiBit Oscilloscope: Temp plot resets to 10sec timeline when switching between emotibits #182

Documentation update

• None

Testing

To Test

• Checkout the required branch and compile from source
• run the application and connect to an EmotiBit.
• Change the time window by pressing the arrow keys
• disconnect from EmotiBit
• Reconnect to EmotiBit/ connect to different EmotiBit
• Observe the timeWindow. It should be same as the value set before disconnect.

Tests performed

Test Configuration:

• EmotiBit software version: 1.7.2.fix-tempPlotTimeScale.0

Input	Observation	Result
Disconnect/connect with same emotibit	timeWindow is maintained	✔️
Connect to different EmotiBit	timeWindow is maintained	✔️
Switch between EmotiBit MD/EM	timeWindow is maintained (even when plots go from 2 -> 1	✔️

Checklist to allow merge

• All dependent repositories used were on branch master
• Software
  • Passed testing on Windows
  • Passed testing on macOS (very minor code change. not testing on macOS to avoid setup time cost)
  • Passed testing on linux (ubuntu)
• Firmware
  • Set testingMode to TestingMode::NONE
  • Set const bool DIGITAL_WRITE_DEBUG = false (if set true while testing)
  • Update version in EmotiBit.h
  • Update library.properties to the correct version (should match EmotiBit.h)
• Update software bundle version in ofxEmotiBitVersion.h
• doxygen style comments included for new code snippets
• Required documentation udpated

Screenshots:

[produceconsumerobot]

Review 01

Code looks good.
If you've tested it, merge it!