Implement tab-switching
Add setting of wall design
Fix navigation bug
Fix styling of small buttons
Fix some bugs in soma template

* Fix bug when checking if value property exists or not
* Allow overwriting the text of a node manually and then by template
Fix styling of duration fields
Add rudimentary support for setting wall duration
Refer to modded soma template until we can get the changes pushed upstream
Fix navigation bug where we always refreshed the whole page on tab switch