Minor layout and panels adjustments

- Used the grid-x/y variable more

- Smaller space at top of tabs-panel so button line up nicer at the top.
https://www.evernote.com/shard/s24/sh/cab66fd8-27d2-46a2-9b40-be811c2ed488/f8e3e6ac400e097f991621e9f2ca8aec

- Spacing of toolbar so that buttons keep their default margin 
https://www.evernote.com/shard/s24/sh/c28e8a44-20a1-4c85-a267-5f405c1836f0/47a94d150c78bfc4b306e7990ce77ea9

- Panel header to line up with toolbar
https://www.evernote.com/shard/s24/sh/52c4fd61-1c2a-4f32-aa3d-f0db2ef9ca4b/dc0c74a094f880c22cbd57200eb11670

- Filter message styles added (part fix for #7884) 
https://www.evernote.com/shard/s24/sh/bddb50f4-e4f5-4ee6-94c7-2c5e480d5727/6978a598c78747e9ef7440ec240c897b

- Batchactions minor adjustment
https://www.evernote.com/shard/s24/sh/46c8aa95-d472-4906-89eb-2cf69209f330/2eca6e54a6e5ae7c46f77a474a11d85f