Feedback fixes

[SergioCasCeb]

For this pull request, some initial UI and functionality issues were solved:

• Changed the text for the filter input within the examples menu.
• Fixed the bug with the visualization view buttons. (Tree and Graph buttons can not be selected if the user is in that current view)
• Resized the header slightly to allow for more space (which also caused a change in the overall size of all components).
• The text color in the share TD/TM input field now adapts to the respective theme colors.
• The interaction buttons for the examples have been changed to better convey their usage, as well as removing the non-working "show snippet" button."

[egekorkan]

So this takes into account the feedback of @danielpeintner , @FadySalama and @relu91 from the discussion #492 . There are some other ones leftover such as:

• Quicker example access
• Logo redesign
• Example filter menu redesign