Re-add markdown, useful for export and editing, remove dirty CSS fix

pica-etherpad/Dockerfile

@@ -45,6 +45,7 @@ RUN curl -SL https://github.com/ether/etherpad-lite/archive/${ETHERPAD_VERSION}.
         ep_font_family \
         ep_headings2 \
         ep_hide_referrer \
+	ep_markdown \
         ep_pad_activity_nofication_in_title \
         ep_pads_stats \
         ep_page_view \
@@ -58,12 +59,6 @@ RUN curl -SL https://github.com/ether/etherpad-lite/archive/${ETHERPAD_VERSION}.
     git --git-dir=src/templates/picasoft-etherpad-landing-page/.git checkout ${ETHERPAD_LANDING_PAGE_VERSION} && \
     cp src/templates/picasoft-etherpad-landing-page/index.html src/templates/index.html && \
     cp src/templates/picasoft-etherpad-landing-page/static/* src/static/ -r && \
-    # Enlarge writing zone
-    sed -i "s|calc(100% - 110px)|100%|g" src/static/skins/colibris/src/layout.css && \
-    # Less margin for comment zone
-    sed -i 's|calc(100% - 150px)|calc(100% - 10px)|g' src/static/skins/colibris/src/layout.css && \
-    # Enlarge lines
-    echo '#innerdocbody > div { margin-right: 0 !important; }' >> src/static/skins/colibris/src/pad-editor.css && \
     # Change default hard-coded pad title
     sed -i 's|Untitled Pad|Nouveau pad|g' node_modules/ep_set_title_on_pad/templates/title.ejs && \
     sed -i 's|Untitled Pad|Nouveau pad|g' node_modules/ep_set_title_on_pad/static/tests/frontend/specs/atest.js