Design tweaks

[jaywink]

• Lose the rounding on the grid boxes
• Fix some colours and top margin for non-stream pages
• Fix some layouting issues with grids
• Move grid item actions under content. Also add time when content was created.

Refs: #104

TODO:

• Ensure dynamic loaded content also uses same grid item layout
• Should timestamp shown be edited, not created? For profiles this makes more sense.
• Fix content delete styling

[codecov-io]

Codecov Report

Merging #115 into master will increase coverage by 0.03%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #115      +/-   ##
==========================================
+ Coverage   95.93%   95.96%   +0.03%     
==========================================
  Files          43       43              
  Lines        1180     1189       +9     
==========================================
+ Hits         1132     1141       +9     
  Misses         48       48

Impacted Files	Coverage Δ
socialhome/streams/templates/streams/base.html	100% <100%> (ø)	✅
socialhome/content/models.py	98.15% <100%> (+0.09%)	✅

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 1855d6d...875c9d3. Read the comment docs.