fix: set icon and text as traits in btn

[12rambau]

Fix #594

Multiple changes:

• deprecate the "icon" and "text" keyword as they are boolean traits of the ipyvuetify Btn. It's still working as init parameter for the time being
• use "gliph" and "msg" instead
• create traits for each one of them
• observe these traints to update the content of the Btn

from sepal_ui import sepalwidgets as sw 

toto = sw.Btn()
toto

toto.msg = "tata"
toto

toto.gliph = "fas fa-folder"
toto

[codecov]

Codecov Report

Merging #608 (cb48df3) into main (2d5126f) will increase coverage by 0.05%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #608      +/-   ##
==========================================
+ Coverage   92.20%   92.25%   +0.05%     
==========================================
  Files          36       36              
  Lines        3886     3913      +27     
==========================================
+ Hits         3583     3610      +27     
  Misses        303      303              

Impacted Files	Coverage Δ
sepal_ui/sepalwidgets/inputs.py	100.00% <ø> (ø)
sepal_ui/reclassify/reclassify_view.py	84.46% <100.00%> (ø)
sepal_ui/reclassify/table_view.py	59.27% <100.00%> (+0.18%)	⬆️
sepal_ui/sepalwidgets/btn.py	100.00% <100.00%> (ø)

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.