various bugfixes !!

[k-y-le]

Closes #417 - mostar ejemplos now translates to ocultar ejemplos in spanish on entry page
Closes #520 - removes line from login page on smaller screens
Closes #516 - fixes server error when drive name is too long
Closes #511 - adds error message if map is empty when submitting
Closes #464 - hide and show examples text only changes depending on visibility of the examples text itself
Closes #443 - fixes errors if selecting an area outside the current state

to test

1. python manage.py migrate
2. check entry page, drive page for bugs above ^^

[codecov]

Codecov Report

Merging #527 (d8cbd26) into staging (91589ef) will decrease coverage by 3.54%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           staging     #527      +/-   ##
===========================================
- Coverage    72.74%   69.20%   -3.55%     
===========================================
  Files          105      106       +1     
  Lines         1919     2130     +211     
===========================================
+ Hits          1396     1474      +78     
- Misses         523      656     +133     

Impacted Files	Coverage Δ
main/migrations/0066_auto_20201223_0731.py	100.00% <100.00%> (ø)
main/models.py	90.64% <100.00%> (ø)
main/views/main.py	31.71% <0.00%> (+1.92%)	⬆️

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[arorasomya]

Just pushed a fix for the typo:

Still kinda happening, but more or less works. We can come back to this later!

[arorasomya]

Wow this is great!!!! Amazing job pushing all these fixes!!!
ps: left another comment and we might need to come back to the double click on show examples.