Beautify skill grid

[spacegaier]

A few visual tweaks:

1. Ensure that all skill boxes in a row have the same height (flex box approach that also works with smaller screen sizes).
2. Use correct hover icon for footer (pointer instead of grab).

After:

[gcampax]

@almakantara is also working on a visual update of the My Skills page in #189. Perhaps you can coordinate this effort?

[spacegaier]

@almakantara is also working on a visual update of the My Skills page in #189. Perhaps you can coordinate this effort?

Did not see that, since the PR title only mentions the chat interface...

[spacegaier]

@almakantara Now that #189 has been merged I updated my PR accordingly.

[almakantara]

@almakantara Now that #189 has been merged I update my PR accordingly.

ok, thanks

[gcampax]

One small issue

[gcampax]

Thank you! Looks good now.