Added check to ensure receive timeout isn't overwritten

[urmahp]

Added a test to verify the changes

This will fix #165

[codecov[bot]]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.06% :tada:

Comparison is base (e85b3ae) 70.35% compared to head (9017a14) 70.42%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #171 +/- ## ========================================== + Coverage 70.35% 70.42% +0.06% ========================================== Files 69 69 Lines 2547 2553 +6 Branches 324 325 +1 ========================================== + Hits 1792 1798 +6 Misses 568 568 Partials 187 187 ``` | [Files Changed](https://app.codecov.io/gh/UniversalRobots/Universal_Robots_Client_Library/pull/171?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=UniversalRobots) | Coverage Δ | | |---|---|---| | [include/ur\_client\_library/ur/dashboard\_client.h](https://app.codecov.io/gh/UniversalRobots/Universal_Robots_Client_Library/pull/171?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=UniversalRobots#diff-aW5jbHVkZS91cl9jbGllbnRfbGlicmFyeS91ci9kYXNoYm9hcmRfY2xpZW50Lmg=) | `100.00% <ø> (ø)` | | | [src/ur/dashboard\_client.cpp](https://app.codecov.io/gh/UniversalRobots/Universal_Robots_Client_Library/pull/171?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=UniversalRobots#diff-c3JjL3VyL2Rhc2hib2FyZF9jbGllbnQuY3Bw) | `68.48% <100.00%> (+0.75%)` | :arrow_up: |

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