Standardise heights of search result cards

[koderjoker]

Description
Subtask of #38: To decide on an equivalent height for all search result cards.

Sample: All cards side by side

Best case

Worst case

Sample: Cards on user favourites page

Details for the current version of cards

Media cards:

• Card area is restricted to 295x180px
• Number of lines for title limited to 2
• Number of lines for author limited to 2
• Area available for image restricted to 160x180px
• Background for image area is set to black
• Image aspect ratio for all images is now preserved
• Replacing our traditional 'image not found' images with that media card's iconochive has been experimented with
• Height of area allotted to media stats is now 40px
• Vertical space has been reduced

Collection cards:

• Card area is restricted to 295x180px
• Adding the collection card's iconochive as an 'Image not found' image has been experimented with
• Image is now a rounded square of 150x150px to reduce whitespace
• Number of lines for title limited to 3
• Height of area allotted to collection stats is now 40px
• Vertical space has been reduced

Account cards:

• Card area is restricted to 295x180px
• User image is now a rounded square of 150x150px to reduce whitespace
• Number of lines for user name restricted to 2
• Height of area allotted to media stats is now 40px
• Vertical space has been reduced

Search results cards:

• Card area is restricted to 295x180px
• Area available for image restricted to 160x180px
• Number of lines for search result title restricted to 2
• Height of area allotted to search result stats is now 40px

Stakeholders
@pezvi @bfalling @iisa