Minor GUI change Capture App : Change "REC" icon background colour from black -> yellow , BW Options >600Khz

[Brumi-2021]

That PR is linked to the previous one #433 (it is a MINOR GUI change)
We are changing "REC" icon background colour from black -> yellow , ONLY in the BW Options of the Capture App, where the current FW is applying decimation to the recorded micro SD Card file ,( that means BW user-selection , >600Khz) :

1-) we leave , the "REC" icon , background colour as it was original (black) in all the BW OPTIONS of the Capture App,
where the recorded file .C16 , has a full real rate sampling , that means (BW <= 600Khz : 8k5, 11k, 16k, 25k, 50k, 100k, 250k, 500k, 600k) Those .C16 recorded files, can be used, as usual , with the Replay App.

2-) We just change the background colour of the "REC" icon , from black -->yellow in the rest of the BW OPTIONS of the Capture App, where the recorded file .C16 is decimated , and therefore has NOT the full real I,Q real rate samples . BW user_selection .>600Khz ; : 750k, 1100k, 1750k, 2000k, 2500k, 2750k ). Those recorded files are still valid to see the spectrum shape, ..., by Inspectrum , or Audacity sw tool ,...but as they do not have all the sampled data (becasuse they are decimated) , they are NOT valid to be used in the Replay App, (that is why we indicate in the GUI, to not confuse to the user)

Example,

(as I was comment in the previous PR #413 )

(It is pending to be investigated in next weeks , if we can also manage to capture BW 750Khz, and 1Mhz with fast micro SD Cards -with low random lattency , and changing that FW decimation threshold point .)

[eried]

Nice idea. I am not thinking if there is a better way (maybe next to the "k" since we have space). Just wondering how confusing will be for users to see a yellow rec button 😸

[Brumi-2021]

Hi , I tried to make a simple code change , and at the same time visible 100% to the user , telling him that something is different . No doubt , that this yellow background icon , will be noticed by everyone .

But I agree with you , that just the colour change alone , will not suggest to the user , the current behind recording limitations .I think that soon or later we will need to add it’s explanation in our wiki Mayhem Apps area .

Of course that we can also add any letter after the “k“, (maybe we may need to change 5 chars to 4 : ´2750k´ to ´2,75M´) ., but maybe we will have similar problem .

Eventually , we can block to the user , the recording to the microSD option , about those decimated files. (It Is up to us ) , but definitely, in my opinion , it is a nice feature , at least keep it , In the LCD screen ( to see spectrum BW > 600khz .)

[ArjanOnwezen]

Yeah or hide it from users by a menu option in options by using a boolean in persistent storage. So at least it's a decision by the user.

[eried]

If someone asks, then we need to add it to the wiki 😸