[#903] Remove questionId uniqueness check at save

* We were validating the uniqueness of the questionId when the user clicks 'save'. This was waiting a second. If during that second the users opens another question for edit, the properties were copied.
[#906] Release Notes v1.7.6.1
Merge pull request #907 from akvo/issue/906-release-notes

[#906] Release Notes v1.7.6.1
Merge branch 'release/1.7.6'
[#888] Manually applying changes from feature branch

See:

https://github.com/akvo/akvo-flow/commit/8816626d31ce3aeb5a2db2258dc271562841e1e5
[#908] Release notes v1.7.6.2

Contains the multiple barcode functionality
Merge branch 'release/1.7.6'
 Please enter a commit message to explain why this merge is necessary,
[#818] Add lein users tab build step to deployment script
Merge pull request #932 from akvo/feature/818-user-roles-and-permissions

[#818] Add lein users tab build step to deployment script
[#818] Temporary workaround for cljs-ajax DELETE bug
Merge pull request #933 from akvo/feature/818-user-roles-and-permissions

[#818] Temporary workaround for cljs-ajax DELETE bug
[#934] Enable super admin list all surveys, forms and data
Merge pull request #935 from akvo/issue/934-superadmin-list-all

[#934] Enable super admin list all surveys, forms and data
[#818] Scroll to top when transitioning between views
Merge pull request #936 from akvo/feature/818-user-roles-and-permissions

[#818] Scroll to top when transitioning between views
[#818] Use url-request-format for DELETE requests
Merge pull request #938 from akvo/feature/818-user-roles-and-permissions

[#818] Use url-request-format for DELETE requests
[#805] Show message when publishing forms
Merge branch 'develop' into release/1.8.0
[#818] rename dom-helpers.cljs -> dom_helpers.cljs