move dragged and dropped events to the end of overlapping ones

Signed-off-by: Tomas Neme <lacrymology@gmail.com>
this should be a private variable

Signed-off-by: Tomas Neme <lacrymology@gmail.com>
move check for event overlap to it's own method

Signed-off-by: Tomas Neme <lacrymology@gmail.com>
use checkOverlap in event creation

Signed-off-by: Tomas Neme <lacrymology@gmail.com>
clamp to beginning or end depending on relative position

Signed-off-by: Tomas Neme <lacrymology@gmail.com>
all this isn't needed

Signed-off-by: Tomas Neme <lacrymology@gmail.com>
rename variables

Signed-off-by: Tomas Neme <lacrymology@gmail.com>
wip
Add schedule conflict message to calendar template and corresponding css
Signed-off-by: Diego Gaustein <diego@gaustein.com.ar>
Overlapping events detection at drop should not match itself
Signed-off-by: Diego Gaustein <diego@gaustein.com.ar>