v2.7.0

Many small patches in this release but we also introduced more icons, new colors and stying for buttons on small screens among other things.

The most important thing to know in this release is that we changed our main color for typography from $ys-color-grey-28 to $ys-color-grey-10. This means #484848 is now changed to #191919 which is slightly darker. All components in YouSee DNA now use the new color for text. But, you need to change this in your local codebase where you have custom styling too!

Overview of the most relevant commits:
f2f26a1 Correct engine version notation
45de094 adding small buttons feature - closes #268
aca3f96 Fixing green color issue when input is not valid - closes #280
2d2f87e Styling for buttons
72b9837 Changing primary color for typography - closes #274
ec50374 replaced external link with new svg
00eae49 added two new icons
473a070 Changing link color to digital-dark-green - closes #269
7e5aff4 added 3 missing icons
00934be Option for hide a notification shadow (backwards compatible)