fix gallery view

[sumandari]

please see #199

• make the gallery as the default view
• change the card color to blue when hovered
• change wording style in the gallery card to Style Type
• pagination auto scroll
• make 1 level downloadable folder

also
fix the hovered image in list view

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[codecov-commenter]

Codecov Report

Merging #200 (259c4a5) into master (bfe8bf1) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #200   +/-   ##
=======================================
  Coverage   68.25%   68.25%           
=======================================
  Files         102      102           
  Lines        3900     3900           
=======================================
  Hits         2662     2662           
  Misses       1238     1238           

Impacted Files	Coverage Δ
qgis-app/urls.py	92.30% <ø> (ø)
qgis-app/settings.py	95.31% <100.00%> (ø)
qgis-app/settings_docker.py	100.00% <100.00%> (ø)

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[dimasciput]

LGTM