D10002: Improve header and screenshots

[Nathaniel Graham]

ngraham created this revision.
ngraham added reviewers: apol, abetts, andreaska, colomar, Discover Software Store, VDG.
Restricted Application added a project: Plasma.
Restricted Application added a subscriber: plasma-devel.
ngraham requested review of this revision.

REVISION SUMMARY
  - Increase size of app icon, name, and caption
  - Remove blue line separating header and screenshots/description, since it was controversial and kind of pointless and inconsistent when the metadata section didn't have a text header
  - Display screenshot thumbnails with the aspect ratio of the full-sized image, so they look better and nothing is cut off in the thumbnail
  - Give screenshot thumbnails a drop shadow
  
  Errata:
  
  - The screenshots lost their hover effect as a side effect of the way the QML DropShadow effect had to be implemented. I tried many ways of adding it, and this was the way that caused the last amount of damage. Definitely open to suggestions.

TEST PLAN
  Tested in KDE Neon:
  
  Pitivi, before:
  
  Pitivi, after:
  
  Audacity, before:
  
  Audacity, after
  
  Clementine, before:
  
  Clementine, after:

REPOSITORY
  R134 Discover Software Store

BRANCH
  Plasma/5.12

REVISION DETAIL
  https://phabricator.kde.org/D10002

AFFECTED FILES
  discover/qml/ApplicationPage.qml
  discover/qml/ApplicationScreenshots.qml

To: ngraham, apol, abetts, andreaska, colomar, #discover_software_store, #vdg
Cc: plasma-devel, ZrenBot, progwolff, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart
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