Move #owngit to dashboard

* splash returns to dashboard again
* adding repos redirects to dashboard
* Moved #owngit form to top of page
* Moved settings to right side of topnav
* Removed username dropdown of topnav
* Reworded repos tabs
Minor: Reword page titles
Minor: Improve docstring and flash for gitauth me()
Fix: walkWithoutGit() broken in 085515a83bdc265ce82f16d1169ebe3195aed326
Fix: redirect all addclone/delclone returns to splash()
Redirect all github add returns to #tab_github tab