vote page improvements

* reduce the table cell heights to be more compact and so when VP votes are displayed the line height is not absurd
* move the notes that used to appear below votes to be linked from above the vote table and put the content into a modal
* fix the alignment of "seat position based on ideology"
* add a note about senate party leaders who vote on the winning side to be able to offer a motion to reconsider
* clean up the text of the aye/yea explanation