Improve the three big buttons

[ddavidebor]

So... These three buttons are the most important pieces of the SW.

from left to right:

1. power on (or off) the instrument
2. opens a new file where to save all the data
3. start/stop acquiring the data (saving it to disk)

issues:

• [x] the center button is bigger than the other two. it should be the same height
• [x] the center button is too evident. It's not more important than the other two
• [x] they miss a description
• [ ] since the right one is recording button, it could display a greyed out "rec" symbol when disabled. It already displays a bright red one when acquiring. generally the recording symbol is a bright red dot.
• [x] it would be nice to add a power symbol to the first button. examples grayed out for off, bright red for on.

It would be nice to add a description above or under the buttons such as:

1. power on
2. select file
3. start acquisition

There is not much space but should be doable

[ghost]

My interpretation/queries:

1. Regarding issue "the center button is too evident. It's not more important than the other two": => Do we need to make the width of all buttons equal or something else is required?

2. Regarding issue "they miss a description": => Do we need to show description in tooltip or label alongside the button?

3. Regarding issue "since the right one is recording button, it could display a greyed out "rec" symbol when disabled. It already displays a bright red one when acquiring. generally the recording symbol is a bright red dot.": => The section adjacent to the "Pause" symbol should display "REC" in grey?

4. Regarding issue "it would be nice to add a power symbol to the first button. examples grayed out for off, bright red for on.": => The section adjacent to the "OFF" text should display power symbol?

[ddavidebor]

1. the make the center button the same height (now it's taller). We'll change the color later
2. If it's possible some labels on top or below the buttons
3. The pause symbol should becore "REC" in grey", while the other symbol (when the button is activated) should be a bright red REC
4. instead of the OFF and ON test, a grayed out power symbol and a bright red power symbol respectively. Simlar to the REC button

[ddavidebor]

from #73 still missing:

The pause symbol should becore "REC" in grey", while the other symbol (when the button is activated) should be a bright red REC