fixed toolbar button spacing

* removed trailing whitespaces in button tids
* defined a global left margin for buttons set to 5px
* slightly less than in view-mode before
* slightly more than in edit-mode before
* but visually more appealing to me
* leaves a wee more room for the title to unfold
removed some more trailing blanks from PageControls

Note: I did NOT test the results as I have yet to figure out how to make
node.js...

* actually run the server without a 403
* build the core tw after me having made changes
Merge pull request #1125 from tobibeer/fix-toolbar-button-spacing

fixed toolbar button spacing